Physicians

Our anesthesiologists are among the most experienced and talented in the world. They have been educated and trained at prestigious institutions, including UC Berkeley, UCLA, UCSF, UC Davis, Harvard, Brown, Tulane, Yale, P&S/Columbia University, Cornell, Stanford, Lewis and Clark, Duke and Rhodes.


Shea Aiken, M.D.

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
Shea Aiken, M.D.

Shea Aiken, M.D.

Joined AAMGi in 2011

Work Locations

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa

Medical School
University of California at San Diego

Undergraduate School
University of California at Riverside

Training
Residency at Stanford University; Fellowship in Cardiothoracic Anesthesia, Stanford; Board certified in Anesthesia.

Other Information
Dr. Aiken serves in various leadership positions at AAMGI and is a past Chief Financial Officer. He is also the current Chairman of the Department of Anesthesiology at Santa Rosa Memorial Hospital. His hobbies include photography, mountain biking and camping.

Colin Bauer, M.D.

  • Santa Rosa Surgery and Endoscopy Center
  • Santa Rosa Memorial Hospital
  • Petaluma Valley Hospital
Colin Bauer, M.D.

Colin Bauer, M.D.

Joined AAMGi in 2013

Work Locations

  • Santa Rosa Surgery and Endoscopy Center
  • Santa Rosa Memorial Hospital
  • Petaluma Valley Hospital
  • Sonoma West Medical Center

Medical School
University of Rochester

Undergraduate School
Rice University, with a degree in Psychology

Training
Residency in Anesthesiology at UCLA; Board certified in Anesthesia.

Other Information
Hobbies include cooking, biking, hiking, and skiing.

Darin Brandt, D.O.

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
  • Advanced Surgery Institute
Darin Brandt, D.O.

Darin Brandt, D.O.

Joined AAMGi in 2010

Work Locations

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
  • Advanced Surgery Institute

Medical School
Kirksville College of Osteopathic Medicine

Undergraduate School
Central Washington University

Training
Internship at Osteopathic Medical Center of Texas and Residency at Oregon Health and Sciences University; Fellowship at NAPE Executive Trans Esophageal Echocardiography, University of Nebraska, and Omaha. Board Certified in Anesthesia, Board Certified in Trans Esophageal Echocardiography.

Darin Brunson, M.D.

  • Advanced Surgery Institute
  • Laservue Eye Center
  • Norcal Specialty Surgery Center
Darin Brunson, M.D.

Darin Brunson, M.D.

Joined AAMGi in 1997

Work Locations

  • Advanced Surgery Institute
  • Laservue Eye Center
  • Norcal Specialty Surgery Center
  • Plastic Surgery Associates
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center

Medical School
University of California at Davis

Undergraduate School
University of California, Santa Barbara

Training
Internship with Kaiser Permanente, San Francisco, CA, Residency with University of California, Davis – Chief Resident 1995-1996. Board Certified in Anesthesia.

Other Information
Dr. Brunson is a Santa Rosa, California native and has two sons. His interests include basketball, skiing, golfing and bicycling.

Robert Bumann, M.D.

  • Santa Rosa Memorial Hospital

Robert Bumann, M.D.

Joined AAMGi in 2017

Work Locations

  • Santa Rosa Memorial Hospital

Medical School
Ludwig-Maximilian University, Munich Germany

Training
Anesthesia Residency at the University of South Florida

Other Information
Sports especially cycling, photography, traveling, and high altitude and hyperbaric medicine.

Bethanie Campbell, M.D.

  • Santa Rosa Memorial Hospital
Bethanie Campbell, M.D.

Bethanie Campbell, M.D.

Joined AAMGi in 2017

Work Locations

  • Santa Rosa Memorial Hospital

Medical School
Mayo Medical School, Rochester, Minnesota

Undergraduate School
Whitman College, Walla Walla, Washington

Training
Transitional Residency at Gundersen Lutheran Medical Center; Anesthesiology Residency at Wake Forest University Baptist Medical Center; Cardiothoracic Fellowship at Wake Forest University Baptist Medical Center

Other Information
Dr. Campbell enjoys hiking, biking, skiing, and spending time with her son.

Richard Chang, M.D.

  • Sutter Medical Center Santa Rosa
  • Santa Rosa Memorial Hospital
  • Sonoma West Medical Center
Richard Chang, M.D.

Richard Chang, M.D.

Joined AAMGi in 2015

Work Locations

  • Sutter Medical Center Santa Rosa
  • Santa Rosa Memorial Hospital
  • Sonoma West Medical Center

Medical School
University of California, San Diego

Undergraduate School
University of California, Berkeley - B.A. in Molecular and Cell Biology

Training
Residency at University of California, Los Angeles; Board Certified in Anesthesia

Other Information
Dr. Chang enjoys basketball, football, golf, hiking, snowboarding, and an avid Cal Berkeley sports fan.

Adrian Chase, M.D.

  • Sonoma West Medical Center
  • Santa Rosa Memorial Hospital
  • Petaluma Valley Hospital
Adrian Chase, M.D.

Adrian Chase, M.D.

Joined AAMGi in 2016

Work Locations

  • Sonoma West Medical Center
  • Santa Rosa Memorial Hospital
  • Petaluma Valley Hospital

Medical School
University of Cincinnati School of Medicine

Undergraduate School
UC Berkeley

Training
Anesthesiology Residency at UC Davis; Board Eligible in Anesthesia

Other Information
Dr. Chase enjoys scuba diving, cycling and traveling.

Joseph Chung, D.O.

  • Pediatric Dental Initiative
  • Plastic Surgery Associates
  • Santa Rosa Memorial Hospital
Joseph Chung, D.O.

Joseph Chung, D.O.

Joined AAMGi in 2005

Work Locations

  • Pediatric Dental Initiative
  • Plastic Surgery Associates
  • Santa Rosa Memorial Hospital
  • Sonoma West Medical Center
  • Sutter Medical Center Santa Rosa

Medical School
Ohio University College of Osteopathic Medicine

Undergraduate School
Pacific Union College in Angwin, CA

Training
Internship at Doctors Hospital in Columbus, OH; Residency at Yale-New Haven Hospital in Connecticut. Board Certified in Anesthesia.

Other Information
Dr. Chung was born in South Korea and immigrated to Napa, CA in 1985 with his family. He went to high school at Rio Lindo Academy in Healdsburg. After completing his residency, he returned to the beautiful weather of California and joined AAMGI. He enjoys tennis, music, movies, reading on financial investments, and spending time with his family and friends.

Patricia L. Decker, M.D.

  • Queen of the Valley Medical Center
  • Santa Rosa Memorial Hospital
Patricia L. Decker, M.D.

Patricia L. Decker, M.D.

Joined AAMGi in 2007

Work Locations

  • Queen of the Valley Medical Center
  • Santa Rosa Memorial Hospital

Medical School
Residency at Stanford University and UCLA. Board certified in Anesthesia

Undergraduate School
Rhodes College, University of Tennessee

Other Information
Dr. Decker is a member of VeloMed. Her hobbies include running, cycling, skiing, traveling and cooking.

Alexander N. Fisher II, M.D.

  • Queen of the Valley Medical Center

Alexander N. Fisher II, M.D.

Joined AAMGi in 2008

Work Locations

  • Queen of the Valley Medical Center

Medical School
The Chicago Medical School, Lake Forest, IL

Undergraduate School
University of California, Davis

Training
Internship: Highland Hospital, Oakland, CA; Residency: The University of Chicago, Chicago IL; Certification: American Board of Anesthesiology; Fellowship: Critical Care Medicine at Vanderbilt University Medical Center Nashville, TN. Board Certified in Anesthesia and in Critical Care Medicine.

Edward Gregoire, M.D.

  • Santa Rosa Memorial Hospital
  • Sonoma West Medical Center
  • Advanced Surgery Institute

Edward Gregoire, M.D.

Joined AAMGi in 2005

Work Locations

  • Santa Rosa Memorial Hospital
  • Sonoma West Medical Center
  • Advanced Surgery Institute
  • Healdsburg District Hospital

Medical School
Ohio State University

Undergraduate School
University of California, Davis

Training
Riverside Methodist Hospital, Columbus, Ohio; Residency: Ohio State University, Columbus, OH. Board Certified in Anesthesia.

Other Information
Dr. Gregoire spent both his elementary and high school years in Santa Rosa. His interests include travel, fishing and skiing.

Heather Hagerman, M.D.

  • Queen of the Valley Medical Center
Heather Hagerman, M.D.

Heather Hagerman, M.D.

Joined AAMGi in 2008

Work Locations

  • Queen of the Valley Medical Center

Medical School
St. Louis University School of Medicine

Undergraduate School
Drury University

Training
Internship and Residency at Vanderbilt University. Board certified in Anesthesia.

Other Information
Dr. Hagerman is the Vice Chairman of the Department of Surgery at Queen of the Valley Medical Center. She enjoys winemaking, hiking, cycling and mountain biking.

Blair A. Halliday, M.D.

  • Healdsburg District Hospital
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center
Blair A. Halliday, M.D.

Blair A. Halliday, M.D.

Joined AAMGi in 1991

Work Locations

  • Healdsburg District Hospital
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center

Medical School
Emory University, Atlanta, GA

Undergraduate School
University of California, Davis

Training
Residency at UCLA; Board certified in Anesthesia.

Other Information
Dr. Halliday is the Medical Director at Santa Rosa Surgery and Endoscopy Center.

Angela Henszel, M.D.

  • Queen of the Valley Medical Center
  • Santa Rosa Memorial Hospital
Angela Henszel, M.D.

Angela Henszel, M.D.

Joined AAMGi in 2017

Work Locations

  • Queen of the Valley Medical Center
  • Santa Rosa Memorial Hospital

Medical School
University of Nevada School of Medicine, Reno, Nevada

Undergraduate School
University of Western Ontario, London, Canada

Training
Residency in Anesthesiology at University of Iowa Hospitals and Clinics; Board Certified in Anesthesia

Other Information
Dr. Henszel enjoys family fun with her husband and 2 sons (traveling, hiking, swimming, walks, painting, reading, downhill skiing). She also has passion for equestrian sport/dressage riding and gardening (flowers not veggies). The Henszels also grow their own grapes and make their own Howell Mountain wine! She also does weight training for general health.

Eric Huczko, M.D.

  • Queen of the Valley Medical Center
Eric Huczko, M.D.

Eric Huczko, M.D.

Joined AAMGi in 2008

Work Locations

  • Queen of the Valley Medical Center

Medical School
University of Virginia, Charlottesville VA

Undergraduate School
University of Pittsburg, Pittsburgh, PA

Training
Internship: California Pacific Medical Center, San Francisco; Residency: University of California Medical Center, San Francisco; Board Certified in Anesthesia.

Other Information
Dr. Huczko is the current President of AAMIG and has served as the Medical Director for Anesthesia at Queen of the Valley Medical Center in Napa, CA. Aside from his M.D. and Ph.D., Dr. Huczko also holds a Master’s in Business Administration degree from George Washington University.

James Mark Hurd, M.D.

  • Advanced Surgery Institute
  • Laservue Eye Center
  • North Bay Eye Associates
James Mark Hurd, M.D.

James Mark Hurd, M.D.

Joined AAMGi in 1995

Work Locations

  • Advanced Surgery Institute
  • Laservue Eye Center
  • North Bay Eye Associates
  • Petaluma Valley Hospital
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center

Medical School
Tulane University, New Orleans, Louisiana

Undergraduate School
University of San Francisco

Training
Internship at St. Mary’s Hospital and Medical Center; Residency at University of California Medical Center, Irvine. Board Certified in Anesthesia.

Other Information
An avid lover of arts, Dr. Hurd developed and produced the first Annual Medical Art Show at Tulane, presenting art of Attendees and Medical Students. He enjoys painting, running, golf, tennis, and good wine.

Kofi Inkabi, M.D.

  • Petaluma Valley Hospital
  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
Kofi Inkabi, M.D.

Kofi Inkabi, M.D.

Joined AAMGi in 2014

Work Locations

  • Petaluma Valley Hospital
  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
  • Advanced Surgery Institute
  • Sonoma West Medical Center

Medical School
University of Louisville School of Medicine

Undergraduate School
Computer & Electrical Engineering, University of Massachusetts at Amherst

Training
General Surgery Internship – State University of New York at Buffalo; Residency in Anesthesia at SUNY at Buffalo; Board Certified in Anesthesia

Other Information
Dr. Inkabi enjoys tennis, football, music, the outdoors and traveling.

Jon Karch, M.D.

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
  • Sonoma West Medical Center
Jon Karch, M.D.

Jon Karch, M.D.

Joined AAMGi in 2015

Work Locations

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
  • Sonoma West Medical Center
  • Advanced Surgery Institute

Medical School
Pennsylvania State University College of Medicine

Undergraduate School
University of California at Berkeley

Training
Residency at University of California Los Angeles; Fellowship in Critical Care Medicine at University of California Los Angeles. Board certified in Anesthesiology. Board Certified in Critical Care Medicine.

Other Information
Dr. Karch’s hobbies include cooking, mountain biking, hiking, camping, snowboarding, and yoga.

Patrick Kinane, D.O.

  • Advanced Surgery Institute
  • Petaluma Valley Hospital
  • Santa Rosa Memorial Hospital
Patrick Kinane, D.O.

Patrick Kinane, D.O.

Joined AAMGi in 2010

Work Locations

  • Advanced Surgery Institute
  • Petaluma Valley Hospital
  • Santa Rosa Memorial Hospital

Medical School
Touro University College of Osteopathic Medicine

Undergraduate School
University of Oregon

Training
Residency at University of Southern California. Board certified in Anesthesia.

Other Information
Dr. Kinane is the Medical Director of Anesthesia at Petaluma Valley Hospital. He is also a member of VeloMed and enjoys mountain biking, skiing and travel.

Erni Kreil, M.D.

  • Queen of the Valley Medical Center
Erni Kreil, M.D.

Erni Kreil, M.D.

Joined AAMGi in 2009

Work Locations

  • Queen of the Valley Medical Center

Medical School
Stanford University School of Medicine

Undergraduate School
Harvard University

Training
Internship at Cleveland Metropolitan General Hospital; Residency at San Francisco General Hospital, University of California and Massachusetts General Hospital, Boston, MA.

Other Information
Dr. Kreil has served as an Instructor at Harvard in the past and is board certified in Anesthesia.

Jeffrey Kuhn, M.D.

  • Advanced Surgery Institute
  • Healdsburg District Hospital
  • Laservue Eye Center
Jeffrey Kuhn, M.D.

Jeffrey Kuhn, M.D.

Joined AAMGi in 1994

Work Locations

  • Advanced Surgery Institute
  • Healdsburg District Hospital
  • Laservue Eye Center
  • North Bay Eye Associates
  • Queen of the Valley Medical Center
  • Santa Rosa Surgery and Endoscopy Center
  • Sutter Medical Center Santa Rosa

Medical School
University of Chicago Medical School

Undergraduate School
UCLA

Training
Residency in internal medicine at Stanford University; Fellowship in pulmonary and critical care medicine at UCLA and Cedars Sinai; Residency in anesthesiology at UCLA. Board certified in Anesthesia.

Other Information
Dr. Kuhn is a member of VeloMed and a regular volunteer for Operation Access. His hobbies include skiing, golfing and bike riding.

Anna V. Logvinova, M.D.

  • Petaluma Valley Hospital
  • Queen of the Valley Medical Center
  • Santa Rosa Memorial Hospital

Anna V. Logvinova, M.D.

Joined AAMGi in 2009

Work Locations

  • Petaluma Valley Hospital
  • Queen of the Valley Medical Center
  • Santa Rosa Memorial Hospital
  • Sonoma West Medical Center

Medical School
M. Sechenov Moscow Medical Academy

Training
University of Washington in Anesthesiology and Perioperative care at UCSF. Board certified in Anesthesia.

Other Information
Dr. Logvinova participates in Operation Access and volunteers as a physician for the San Francisco Boys Chorus Away Camp in Healdsburg. Her interests include classical music, travel, cooking, gardening and spending time with her children.

Steven Marlowe, M.D.

  • Advanced Surgery Institute
  • Sutter Medical Center Santa Rosa
Steven Marlowe, M.D.

Steven Marlowe, M.D.

Joined AAMGi in 2007

Work Locations

  • Advanced Surgery Institute
  • Sutter Medical Center Santa Rosa

Medical School
George Washington University

Undergraduate School
Stanford University

Training
Residency at Stanford University 1989; Internship: Santa Clara County Valley Medical Center, Santa Clara, CA; Fellowship: Virginia Mason Clinic, Pain/Regional Anesthesia; Board Certified in Anesthesia.

Brian Marsh, M.D.

  • 4th Street Laser & Surgery Center
  • Norcal Specialty Surgery Center
  • Santa Rosa Memorial Hospital

Brian Marsh, M.D.

Joined AAMGi in 1995

Work Locations

  • 4th Street Laser & Surgery Center
  • Norcal Specialty Surgery Center
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center

Medical School
Oregon Health Sciences University

Undergraduate School
Lewis & Clark College

Training
Residency at University of California at Davis. Board certified in Anesthesia.

Other Information
Dr. Marsh is a member of VeloMed. He coaches soccer, enjoy biking, running and golf.

Daniel Masluk, M.D.

  • Queen of the Valley Medical Center
  • Santa Rosa Memorial Hospital
Daniel Masluk, M.D.

Daniel Masluk, M.D.

Joined AAMGi in 2007

Work Locations

  • Queen of the Valley Medical Center
  • Santa Rosa Memorial Hospital

Medical School
Medical University of Pecs, Hungary and Tulane University School of Medicine

Undergraduate School
UCLA

Training
Residency in Anesthesiology at University of California, Irvine. Board certified in Anesthesia.

Other Information
Dr. Masluk was Chief of Medical Staff at Queen of the Valley Medical Center from 2003 to 2005. He joined AAMGI in 2007 after 18 years as a solo practitioner. His hobbies include playing the piano, bicycling, scuba diving and cooking. He reads voraciously.

Margaret McEvoy, M.D.

  • Norcal Specialty Surgery Center
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center

Margaret McEvoy, M.D.

Joined AAMGi in 1994

Work Locations

  • Norcal Specialty Surgery Center
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center

Medical School
University of California, Davis

Undergraduate School
University of California, San Francisco

Training
Internship AT Kaiser Permanente, San Francisco; Residency at University of California, Davis; Board Certified in Anesthesia.

Other Information
Dr. McEvoy is the current elect Chief of Staff of Santa Rosa Memorial Hospital and has previously served as the Medical Director of Petaluma Valley Hospital Operating Rooms, Anesthesia Section Chairman at Santa Rosa Memorial Hospital, Medical Director of Santa Rosa Memorial Operating Rooms, and Chairman of the Wellbeing Committee at Santa Rosa Memorial Hospital. She is a native of Sonoma County, growing up in Petaluma. Dr. McEvoy is an avid runner and an active aunt to her eleven nieces and nephews.

Farheen Mirza, M.D.

  • Petaluma Valley Hospital
  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
Farheen Mirza, M.D.

Farheen Mirza, M.D.

Joined AAMGi in 2014

Work Locations

  • Petaluma Valley Hospital
  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
  • Advanced Surgery Institute

Medical School
University of Missouri Kansas City School of Medicine

Undergraduate School
University of Missouri Kansas City

Training
Residency at St. Luke’s Roosevelt Hospital Center New York, NY Fellowship; Regional Anesthesia Fellowship Columbia University New York, NY; Obstetric Anesthesia Fellowship Stanford University School of Medicine Stanford, CA

Other Information
Dr. Mirza’s hobbies include cooking, hiking, yoga and volleyball

Basavaraj Nagappala, M.D.

  • North Bay Endoscopy Center
  • Pediatric Dental Initiative
  • Petaluma Valley Hospital
Basavaraj Nagappala, M.D.

Basavaraj Nagappala, M.D.

Joined AAMGi in 2007

Work Locations

  • North Bay Endoscopy Center
  • Pediatric Dental Initiative
  • Petaluma Valley Hospital
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center
  • Sutter Medical Center Santa Rosa

Medical School
New York Medical College

Undergraduate School
Mysore University, India

Training
Internship at Our Lady of Mercy Medical Center, Bronx, NY and residency at Westchester Medical Center, at New York Medical College. Board Certified in Anesthesia.

Other Information
Dr. Nagappala has a special interest in regional and pediatric anesthesia.

John W. Nimtz, M.D.

  • Pediatric Dental Initiative
  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
John W. Nimtz, M.D.

John W. Nimtz, M.D.

Joined AAMGi in 1991

Work Locations

  • Pediatric Dental Initiative
  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa

Medical School
University of Michigan

Undergraduate School
University of Michigan

Training
Community Hospital of Sonoma County Family Practice 1979-1982. University of California, San Francisco; Associate Clinical Professor of UCSF in 1986. Board certified in Anesthesia as well as Family Medicine.

Other Information
Dr. Nimtz is a past President and Chief Medical Officer of AAMGI. He is also a member of VeloMed and volunteers at the Redwood Empire Food Bank. His hobbies include running, hiking, bicycling, backpacking, gardening and canning.

Anup Patel, M.D.

  • Sutter Medical Center Santa Rosa
  • Norcal Specialty Surgery Center

Anup Patel, M.D.

Joined AAMGi in 2017

Work Locations

  • Sutter Medical Center Santa Rosa
  • Norcal Specialty Surgery Center

Medical School
Medical College of Wisconsin

Undergraduate School
University of Illinois, Master in Science from Northwestern University

Training
Residency in Anesthesiology Northwestern Memorial Hospital

Other Information
Dr. Patel enjoys photography, writing, Spanish, multiple sports and travel.

Richard Pollock, M.D.

  • Sutter Medical Center Santa Rosa

Richard Pollock, M.D.

Joined AAMGi in 2017

Work Locations

  • Sutter Medical Center Santa Rosa

Medical School
Johns Hopkins University

Undergraduate School
Michigan State University

Training
Johns Hopkins Hospital Anesthesiology Residency, Board Certified Anesthesia

Robert M. Pousman, D.O.

  • Healdsburg District Hospital
  • Petaluma Valley Hospital
  • Santa Rosa Memorial Hospital

Robert M. Pousman, D.O.

Joined AAMGi in 2013

Work Locations

  • Healdsburg District Hospital
  • Petaluma Valley Hospital
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center
  • Sutter Medical Center Santa Rosa

Medical School
Temple University/UMDNJ-SOM

Undergraduate School
Temple University/UMDNJ-SOM

Training
Residency in Anesthesiology and Fellowship in Critical Care Medicine at University of Texas and Houston/Hermann Hospital; Board certified in Anesthesia, as well as critical care medicine.

Other Information
Dr. Pousman’s hobbies include mountain biking, snowboarding, surfing and trail running.

Christopher Press, M.D.

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
  • Petaluma Valley Hospital
Christopher Press, M.D.

Christopher Press, M.D.

Joined AAMGi in 2016

Work Locations

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
  • Petaluma Valley Hospital

Medical School
Tulane University

Undergraduate School
Emory University

Training
Residency at Stanford University; Fellowship in Cardiovascular and Thoracic Anesthesia at Stanford University; Board certified in Anesthesia.

Other Information
Dr. Press enjoys swimming, biking, and scuba diving.

Donald Reeves, M.D.

  • North Bay Endoscopy Center
  • Petaluma Valley Hospital
  • Santa Rosa Surgery and Endoscopy Center

Donald Reeves, M.D.

Joined AAMGi in 1995

Work Locations

  • North Bay Endoscopy Center
  • Petaluma Valley Hospital
  • Santa Rosa Surgery and Endoscopy Center

Medical School
University of California, Davis

Undergraduate School
University of California, Los Angeles

Training
Internship and Residency at University of California, Davis Medical Center; Board

Other Information
Dr. Reeves enjoys spending time off work with his wife and two sons at their Petaluma home.

David L. Robertson, D.O.

  • Advanced Surgery Institute
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center
David L. Robertson, D.O.

David L. Robertson, D.O.

Joined AAMGi in 1991

Work Locations

  • Advanced Surgery Institute
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center
  • Sutter Medical Center Santa Rosa

Medical School
University of Osteopathic Medicine and Health Sciences, Des Moines, IA

Undergraduate School
Virginia Polytechnic Institute with a degree in Animal Science

Training
Internship in Naval Hospital San Diego, CA; Residency at Naval Hospital Oakland, CA; Fellowships in Cardiovascular Anesthesia at Texas Heart Institute, Houston, TX and Peri-Operative Echocardiography at the University of Utah. Board certified in Anesthesia, and Echocardiography.

Other Information
Dr. Robertson is the current Chief Medical Officer of AAMGI and Chairperson of the AAMGI Substance Monitoring Committee. He founded and is the President of VeloMed, a team of medical professionals who are avid cyclists and provide volunteer riding medical support for organized bicycle rides as well as promote bicycle safety in Sonoma County. Dr. Robertson served in the US Navy for 8 years from 1983 to 1991. Dr. Roberson previously served as the Chief Medical Officer of USS Cleveland, LPD-7 and also served aboard the USS Ranger, CV-61 during Desert Storm.

Catherine M. Roby, D.O.

  • Santa Rosa Memorial Hospital
  • Petaluma Valley Hospital
  • Sutter Medical Center Santa Rosa
Catherine M. Roby, D.O.

Catherine M. Roby, D.O.

Joined AAMGi in 2016

Work Locations

  • Santa Rosa Memorial Hospital
  • Petaluma Valley Hospital
  • Sutter Medical Center Santa Rosa

Medical School
Midwestern University - Arizona College of Osteopathic Medicine

Undergraduate School
University of California, Davis

Training
Residency in Anesthesiology at University of Texas Southwestern in Dallas, TX; Board certified in Anesthesia.

Other Information
Hobbies and interests include wine, traveling, musical theater, piano, tennis, and the San Francisco Giants.

Jerrad Roby, D.O.

  • Sutter Medical Center Santa Rosa
  • Santa Rosa Memorial Hospital

Jerrad Roby, D.O.

Joined AAMGi in 2017

Work Locations

  • Sutter Medical Center Santa Rosa
  • Santa Rosa Memorial Hospital

Medical School
Midwestern University – Arizona College of Osteopathic Medicine, Glendale

Undergraduate School
Northern Arizona University, Flagstaff

Training
Residency in Anesthesia at UT Southwestern Medical Center, Dallas; Board Certified in Anesthesia

Dirk Schermer, M.D.

  • Laservue Eye Center
  • North Bay Eye Associates
  • Plastic Surgery Associates
Dirk Schermer, M.D.

Dirk Schermer, M.D.

Work Locations

  • Laservue Eye Center
  • North Bay Eye Associates
  • Plastic Surgery Associates
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center
  • Sutter Medical Center Santa Rosa

Medical School
University of California, San Francisco

Undergraduate School
University of California, Davis

Training
Internship at Kaiser Permanente, San Francisco; Residency and Fellowship at University of California, San Francisco; Board Certified in Anesthesia

Other Information
Dr. Schermer has been active in leadership and is a past President of AAMGI.

Karen M. Schmidt, D.O.

  • Norcal Specialty Surgery Center
  • Santa Rosa Memorial Hospital
  • Sonoma Developmental Center
Karen M. Schmidt, D.O.

Karen M. Schmidt, D.O.

Joined AAMGi in 1991

Work Locations

  • Norcal Specialty Surgery Center
  • Santa Rosa Memorial Hospital
  • Sonoma Developmental Center
  • Sonoma West Medical Center

Medical School
Kansas City University of Medicine and Biosciences

Undergraduate School
UCLA

Training
Internship, Bay City, MI; Anesthesiology Residency at University of Michigan, Ann Arbor. Board certified in Anesthesia, as well as Osteopathic Medicine.

Other Information
Dr. Schmidt is a member of Bethlehem Lutheran Church’s Health Ministry Committee, Caring Connection Committee and Baptismal Cradle Roll. She is also a member of VeloMed and plays racquetball. She is the winner of 2014 National Singles Women’s 55+ A level and third in Women’s all age A’s, 2014 Sonoma County Senior Games Women’s second place.

Kseniya Shvachko, M.D.

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
  • Sonoma West Medical Center
Kseniya Shvachko, M.D.

Kseniya Shvachko, M.D.

Joined AAMGi in 2015

Work Locations

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
  • Sonoma West Medical Center

Medical School
Ural State Medical Academy

Training
Internal Medicine residency at Saint Mary's Medical Center, San Francisco 2009-2012, Board Certified in Internal Medicine; Anesthesiology and Pain Medicine residency at UC Davis Medical Center 2012-2015, Board Certified in Anesthesiology and Pain Medicine

Other Information
Dr. Shvachko enjoys beautiful weather and nature of Northern California, hiking, gardening, traveling, wine tasting, exploring new places and classical music.

Robert C. Singler, M.D.

  • Queen of the Valley Medical Center
Robert C. Singler, M.D.

Robert C. Singler, M.D.

Joined AAMGi in 2007

Work Locations

  • Queen of the Valley Medical Center

Medical School
Duke University

Undergraduate School
Oberlin College

Training
Internship (Surgery) and Residency at University of California, San Francisco; Fellowship at Virginia Mason Clinic, Seattle, WA; Board Certified in Anesthesia. Dr. Singler has previously served as an Assistant Clinical Professor, UC San Francisco. Board Certified in Anesthesia.

Other Information
Dr. Singler has previously served as the Medical Director of the Queen of the Valley Outpatient Surgery & Procedure Center as well as the Chief of Anesthesia Department at Queen of the Valley Medical Center. He has also served as a member of the board of directors of the California Society of Anesthesiologists as well as in numerous other professional leadership roles. Dr. Singler is a Colonel in the Air Force Reserve, and has served as an anesthesiologist and flight surgeon for many years. More recently, he was the commander of a field hospital in Iraq during the conflict in 2003. Col. Singler currently serves as a Reservist attached for advisory duty at the Pentagon, Washington, DC.

Scott Sugar, M.D.

  • Sonoma West Medical Center
  • Santa Rosa Memorial Hospital
Scott Sugar, M.D.

Scott Sugar, M.D.

Joined AAMGi in 2016

Work Locations

  • Sonoma West Medical Center
  • Santa Rosa Memorial Hospital

Medical School
University of Texas at Southwestern Medical School, Dallas, TX

Undergraduate School
Southern Methodist University, Dallas, TX

Training
Residency in Anesthesiology, Ochsner Medical Center, New Orleans, LA

Other Information
Originally from Louisiana, Dr. Sugar is an avid musician, playing music of all types, especially guitar, piano, and violin. He enjoys spending time with his family, as well as Crossfit and swimming.

Peter E. Sybert, M.D.

  • Healdsburg District Hospital
  • Santa Rosa Memorial Hospital

Peter E. Sybert, M.D.

Joined AAMGi in 1991

Work Locations

  • Healdsburg District Hospital
  • Santa Rosa Memorial Hospital

Medical School
College of Physicians and Surgeons of Columbia University

Undergraduate School
University of California, Berkeley

Training
Residency, University of California, San Francisco; Fellowship, University of California, San Francisco

Other Information
Dr. Sybert has held leadership positions with AAMGI since its organization in 1991 and is a past President, Chief Financial Officer and Chief Information Officer. Dr. Sybert is extensively involved in professional organizations in anesthesia and is a past president of the California Society of Anesthesiologists and serves as the current Secretary of Sonoma County Medical Association.

Peter B. Thornhill, M.D.

  • Santa Rosa Memorial Hospital
Peter B. Thornhill, M.D.

Peter B. Thornhill, M.D.

Joined AAMGi in 2017

Work Locations

  • Santa Rosa Memorial Hospital

Medical School
McGill Univeristy

Undergraduate School
McGill University

Training
Residency in Anesthesiology, SUNY Downstate Medical Center

Scott Tweten, M.D.

  • North Bay Endoscopy Center
  • North Bay Eye Associates
  • Petaluma Valley Hospital
Scott Tweten, M.D.

Scott Tweten, M.D.

Joined AAMGi in 2007

Work Locations

  • North Bay Endoscopy Center
  • North Bay Eye Associates
  • Petaluma Valley Hospital
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center

Medical School
Tulane University School of Medicine

Undergraduate School
Northwestern University

Training
Internship at University of Minnesota; Residency at Stanford University

Other Information
Dr. Tweten is actively involved in leadership activities in AAMGI. He worked in Marin County for a decade before joining AAMGI. He resides in rural Sonoma County with his family.

Timothy Ungerer, D.O.

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa
Timothy Ungerer, D.O.

Timothy Ungerer, D.O.

Joined AAMGi in 2017

Work Locations

  • Santa Rosa Memorial Hospital
  • Sutter Medical Center Santa Rosa

Medical School
Philadelphia College of Osteopathic Medicine

Undergraduate School
University of Pittsburg

Training
Internship at Inspira Health Network, Regional Medical Center, Vineland, New Jersey; Residency in Anesthesiology at Baystate Medical Center, Springfield, Massachusetts

Other Information
My interests include golf, tennis, basketball, camping, and traveling.

Antonio Wong, M.D.

  • Sonoma West Medical Center
  • Advanced Surgery Institute
  • Sutter Medical Center Santa Rosa

Antonio Wong, M.D.

Joined AAMGi in 2016

Work Locations

  • Sonoma West Medical Center
  • Advanced Surgery Institute
  • Sutter Medical Center Santa Rosa
  • Santa Rosa Memorial Hospital

Medical School
University of California San Francisco

Undergraduate School
University of California Berkeley, University of California Davis

Training
Internship Internal Medicine, Highland Hospital, Oakland, California; Residency Anesthesia, Stanford University Hospital; Board Certified Anesthesia

Other Information
Dr. Wong enjoys whitewater rafting, photography, skiing, sailing, and biking.

Robert J. Wood, M.D.

  • Healdsburg District Hospital
  • Laservue Eye Center
  • Santa Rosa Memorial Hospital
Robert J. Wood, M.D.

Robert J. Wood, M.D.

Joined AAMGi in 1999

Work Locations

  • Healdsburg District Hospital
  • Laservue Eye Center
  • Santa Rosa Memorial Hospital
  • Santa Rosa Surgery and Endoscopy Center

Medical School
Cornell University Medical College

Undergraduate School
University of California, Berkeley

Training
Internship and Residency at University of California, Davis; Board Certified in Anesthesia.

Susan Yamanishi, M.D.

  • Queen of the Valley Medical Center
Susan Yamanishi, M.D.

Susan Yamanishi, M.D.

Joined AAMGi in 2008

Work Locations

  • Queen of the Valley Medical Center

Medical School
U.C. San Francisco School of Medicine, U.C. Berkeley School of Public Health

Undergraduate School
UC Berkeley

Training
Internship at California Pacific Medical Center, San Francisco; Residency at U.C. San Francisco. Board Certified in Anesthesia

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