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Anesthesiologist | Nurse Anesthetist | Northwest Anesthesia Physicians Northwest Anesthesia Physicians Anesthesiologist | Nurse Anesthetist | Northwest Anesthesia Physicians
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Anesthesia Interview: 541-222-3154
Post Operative Issues: 541-222-7522
Billing Office: 541-686-9551

Our Staff

AllAnesthesiologistsNurse AnesthetistsAcute Pain Team

Mathieu Assercq, MD

Anesthesiologist

Mathieu Assercq, MD
Anesthesiologist

Medical education:
Medical school: Louisiana State University Health Science (2018)
Residency: Univ. of Missouri-Kansas City School of Medicine (2022)

Board certification: Anesthesiology (In ABA System)

NAP anesthesiologist since: 2022

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Stephen Aufderheide, MD

Anesthesiologist

Stephen Aufderheide, MD
Anesthesiologist

Medical education:
Medical school: University of Arizona College of Medicine (1996)
Residency: The Johns Hopkins Hospital (2000)
Fellowship: Cardiothoracic Anesthesia, The Johns Hopkins Hospital (2001)

Board certification: Anesthesiology (2001)

NAP anesthesiologist since: 2004

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Meg Barnhart, MD

Anesthesiologist

Meg Barnhart, MD
Anesthesiologist

Medical education:
Medical school: University of Arizona College of Medicine (2011)
Residency: Loma Linda Univ. Medical Center (2015)

Board certification: Anesthesiology (2016)

NAP anesthesiologist since: 2015

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Walter Bernard, MD

Anesthesiologist

Walter Bernard, MD
Anesthesiologist

Medical education:
Medical school: University of Missouri (1986)
Residency: Stanford University (1990)

Board certification: Anesthesiology (1991)

NAP anesthesiologist since: 2000

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Peter Bissonnette, MD

Anesthesiologist

Peter Bissonnette, MD
Anesthesiologist

Medical education:
Medical school: University of Wisconsin School of Medicine and Public Health (2001)
Residency: Medical College of Wisconsin (2005)

Board certification: Anesthesiology (2006)

NAP anesthesiologist since: 2005

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Kristen Engstrom, MSN

CRNA

Kristen Engstrom, MSN
CRNA

School graduated with CRNA Degree: Bryan College of Health Sciences, Lincoln, NE

License and Year Obtained: CRNA 2013

NAP CRNA since: 2022

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William Brown, MD

Anesthesiologist

William Brown, MD
Anesthesiologist

Medical education:
Medical school: Meharry Medical College (2018)
Residency: Dartmouth-Hitchcock (2022)
Fellowship: Regional and Acute Pain, Dartmouth-Hitchcock (2023)

Board certification: Anesthesiology (2023) 

NAP anesthesiologist since: 2023

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Robert Carricaburu, MD

Anesthesiologist

Robert Carricaburu, MD
Anesthesiologist

Medical education:
Medical school: Creighton University (1999)
Residency: University of Wisconsin (2003)

Board certification: Anesthesiology (2004)

NAP anesthesiologist since: 2004

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Rebecca Carroll, MD

Anesthesiologist

Rebecca Carroll, MD
Anesthesiologist

Medical education:
Medical school: Rosalind Franklin University of Medicine and Science (2006)
Residency: University of Texas, Dept of Anesthesiology (2011)

Board certification: Anesthesiology (2016)

NAP anesthesiologist since: 2021

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Domenico Castaldo, MD

Anesthesiologist

Domenico Castaldo, MD
Anesthesiologist

Medical education:
Medical school: University of Texas (1998)
Residency: University of California San Diego Medical Center (2002)

Board certification: Anesthesiology (2003)

NAP anesthesiologist since: 2002

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Albert Cho, MD

Anesthesiologist

Albert Cho, MD
Anesthesiologist

Medical education:
Medical school: Arizona College of Osteopathic Medicine of Midwestern University (2002)
Residency: Tufts University Baystate Medical Center (2007)

Board certification: Anesthesiology (2008)

NAP anesthesiologist since: 2007

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Roger Coleman, MD

Anesthesiologist

Roger Coleman, MD
Anesthesiologist

Medical education:
Medical school: Oregon Health and Science University (2004)
Residency: Oregon Health and Science University (2008)

Board certification: Anesthesiology (2009)

NAP anesthesiologist since: 2008

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Charles Cook, MD

Anesthesiologist

Charles Cook, MD
Anesthesiologist
Medical education: Medical school: Loma Linda University (1983) Residency: Loma Linda University (1986) Board certification: Anesthesiology (1988) NAP anesthesiologist since: 2020
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Martin D' Ambrosio, MD

Anesthesiologist

Martin D' Ambrosio, MD
Anesthesiologist

Medical education:

Medical school: Universidad de Buenos Aires School of Medicine 

Residency: University of Iowa Anesthesiology 

Fellowship: Cardiothoracic, Texas Heart Institute (2019)

 

Board certification: Anesthesiology 2019, Cardiothoracic 

NAP anesthesiologist since: 2019

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Mark Dewsnup, MD

Anesthesiologist

Mark Dewsnup, MD
Anesthesiologist

 

Medical education:
Medical school: Wake Forest School of Medicine (2020)
Residency: Wake Forest School of Medicine, Anesthesiology (2024)

Board certification: Anesthesiology (in ABA exam system)

NAP anesthesiologist since: 2024

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Dierdre Garton, MD

Anesthesiologist

Dierdre Garton, MD
Anesthesiologist

Medical education:
Medical school: Oregon Health and Science University (2013)
Residency: University of Rochester Medical Center (2017)

Board certification: Anesthesiology (2021)

NAP anesthesiologist since: 2017

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Emily Gerstman, MD

Anesthesiologist

Emily Gerstman, MD
Anesthesiologist

Medical education:
Medical school: Medical College of Wisconsin (2009)
Residency: Medical College of Wisconsin (2013)

Board certification: Anesthesiology (2014)

NAP anesthesiologist since: 2013

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Jon Saxon Gilbert, MD

Anesthesiologist

Jon Saxon Gilbert, MD
Anesthesiologist

Medical education:
Medical school: Dartmouth Medical School (2000)
Residency: Oregon Health and Science University  (2008)

Board certification: Anesthesiology (2009)

NAP anesthesiologist since: 2021

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Benjamin S. Gmelch, MD

Anesthesiologist

Benjamin S. Gmelch, MD
Anesthesiologist
Medical education: Medical school: Oregon Health and Science University (2004) Residency: Virginia Mason Medical Center (2008) Fellowship: Perioperative Echocardiography, University of Utah (2009) Board certification: Anesthesiology (2009) NAP anesthesiologist since: 2013
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Dexter Gregg, MD

Anesthesiologist

Dexter Gregg, MD
Anesthesiologist

Medical education:
Medical school: Michigan State Univ. College of Medicine (2018)
Residency: Cedars-Sinai Medical Center (2022)

Fellowship: Regional and Acute Pain, Hospital for Special Surgery, NY (2023)

Board certification: Anesthesiology (2024)

NAP anesthesiologist since: 2023

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John Guevara, MD

Anesthesiologist

John Guevara, MD
Anesthesiologist

Medical education:
Medical school: UCLA School of Medicine (1987)
Residency: Harbor - UCLA Medical Center (1991)

Board certification: Anesthesiology (1993)

NAP anesthesiologist since: 2020

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Keegan Guffey, MD

Anesthesiologist

Keegan Guffey, MD
Anesthesiologist

Medical education:
Medical school: West Virginia Univ. School of Medicine (2019)
Residency: West Virginia University (2023)

Board certification: Anesthesiology (2024)

NAP anesthesiologist since: 2023

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Seth Gunderson, DO

Anesthesiologist

Seth Gunderson, DO
Anesthesiologist
Medical education: Medical school: A.T. Still University-Kirksville College of Osteopathic Medicine (2009) Residency: Heart of Lancaster Regional Medical Center (2013) Fellowship: Critical Care, Univ of Virginia Health System (2014) Board certification: Anesthesiology (2016) Critical Care (2017) NAP anesthesiologist since: 2019
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Christopher Hagen, MD

Anesthesiologist

Christopher Hagen, MD
Anesthesiologist

Medical education:
Medical school: University of Washington School of Medicine (2003)
Residency: Virginia Mason Medical Center (2007)

Board certification: Anesthesiology (2009)

NAP anesthesiologist since: 2008

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Daniel Hagengruber, MD

Anesthesiologist

Daniel Hagengruber, MD
Anesthesiologist

Medical education:

Medical school: University of Wisconsin School of Medicine and Public Health (1991)

Residency: University of Utah (1995)

Board certification: Anesthesiology (1996)

NAP anesthesiologist since: 1995

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Holger Hennig, MD

Anesthesiologist

Holger Hennig, MD
Anesthesiologist

Medical education:

Medical school: University of Wurzburg (1992)

Residency: University of Utah, Department of Anesthesiology (1999)

Fellowship: Pain Medicine, University of Utah (2000)

 

Board certification: Anesthesiology 2003

NAP anesthesiologist since: 2021

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Mark Hibbard, MD

Anesthesiologist

Mark Hibbard, MD
Anesthesiologist

Medical education:
Medical school: Albany Medical College (2001)
Residency: Henry Ford Hospital (2005)

Board certification: Anesthesiology (2006)

NAP anesthesiologist since: 2005

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Jennifer Hickman, MD

Anesthesiologist

Jennifer Hickman, MD
Anesthesiologist
Medical education: Medical school: Medical College of Wisconsin (2002) Residency: Medical College of Wisconsin (2005) Fellowship: Pain, Medical College of Wisconsin (2008) Pediatrics, Medical College of Wisconsin (2008) Board certification: Anesthesiology (2010) Pain (2012) Pediatrics (2013) NAP anesthesiologist since: 2020
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Bob Hitchcock, DO

Anesthesiologist

Bob Hitchcock, DO
Anesthesiologist

Medical Education: 

Medical school: Lake Erie College of Osteopathic Medicine (2013)

Residency: University of Iowa (2017)

Cardiovascular fellowship: University of Kentucky (2019)

Board certification: Anesthesiology (2018)

NAP anesthesiologist since: 2019

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Brian Jones, MD

Anesthesiologist

Brian Jones, MD
Anesthesiologist

Medical education:

Medical school: Oregon Health and Science University (1994)

Residency: University of Iowa (1998)

Fellowship: Obstetrical Anesthesia, Duke University (1999)

Board certification: Anesthesiology (1999)

NAP anesthesiologist since: 2005

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Setiawan Kamaru, DO

Anesthesiologist

Setiawan Kamaru, DO
Anesthesiologist

Medical education:
Medical school: Michigan State University (1999)
Residency: Henry Ford Hospital (2004)

Board certification: Anesthesiology (2005)

NAP anesthesiologist since: 2004

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Alexander Legg, MD

Anesthesiologist

Alexander Legg, MD
Anesthesiologist

Medical education:
Medical school: Oregon Health & Science University (2017)
Residency: University of Washington (2021)

Board certification: Anesthesiology (2022)

NAP anesthesiologist since: 2021

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Gail McKelvy, RN

RN

Gail McKelvy, RN
RN

School graduated with RN degree: Lane Community College

License and Year Obtained: RN, 1981

NAP RN since: 3/2007

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Harry Mai, MD

Anesthesiologist

Harry Mai, MD
Anesthesiologist

Medical education:
Medical school: David Geffen School of Medicine (2016)
Residency: Brown University (2021)

Board certification: Anesthesiology (2022)

NAP anesthesiologist since: 2024

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Laura McElroy, MD

Anesthesiologist

Laura McElroy, MD
Anesthesiologist
Medical education: Medical school: University of Toledo College of Medicine (2009) Residency: University of Rochester Medical Center (2013) Fellowship: Critical Care, University of Rochester Medical Center (2014) Board certification: Anesthesiology (2015) Critical Care (2017) NAP anesthesiologist since: 2022
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Michael Moore, MD

Anesthesiologist

Michael Moore, MD
Anesthesiologist

Medical education:

Medical school: University of Texas Health Science Center San Antonio (2012)

Residency: University of New Mexico School of Medicine (2016)

Board certification: Anesthesiology (2018)

NAP anesthesiologist since: 2016

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Scott Myrick, MD

Anesthesiologist

Scott Myrick, MD
Anesthesiologist

Medical education:
Medical school: David Geffen School of Medicine at UCLA, 2006
Residency: University of California San Diego Medical Center (2010)

Board certification: Anesthesiology (2011)

NAP anesthesiologist since: 2010

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Evan New, DO

Anesthesiologist

Evan New, DO
Anesthesiologist

Medical education:
Medical school: University of New England College of Osteopathic Medicine (2018)
Residency: Temple University (2022)

Board certification: Anesthesiology (In ABA Exam System)

NAP anesthesiologist since: 2022

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Luat Nguyen, MD

Anesthesiologist

Luat Nguyen, MD
Anesthesiologist

Medical education:
Medical school: Penn State University (1989)
Residency: Massachusetts General Hospital (1997)
Fellowship: Critical Care, Massachusetts General Hospital (1998)

Board certification: Anesthesiology (1998) Critical Care (1999)

NAP anesthesiologist since: 1999

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Gary Nissen, MD

Anesthesiologist

Gary Nissen, MD
Anesthesiologist

Medical education:
Medical school: Creighton University (2017)
Residency: Virginia Mason Medical Center (2021)

Board certification: Anesthesiology (2022)

NAP anesthesiologist since: 2021

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Stacie H. Oh, MD

Anesthesiologist

Stacie H. Oh, MD
Anesthesiologist

Medical education:
Medical school: University of Kansas School of Medicine (2006)
Residency: University of North Carolina (2007)

Board certification: Anesthesiology (2011)

NAP anesthesiologist since: 2010

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Michael Ostrovsky, MD

Anesthesiologist

Michael Ostrovsky, MD
Anesthesiologist

Medical education:

Medical school: Northwestern University Medical School (1995)

Residency: Detroit Medical Center (2000)

Fellowship: Cardiothoracic Anesthesia, Mount Sinai School of Medicine (2003)

Board certification: Anesthesiology (2003)

NAP anesthesiologist since: 2015

 

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Jocelyn A. Park, MD

Anesthesiologist

Jocelyn A. Park, MD
Anesthesiologist

Medical education:
Medical school: University of New Mexico School of Medicine (2004)
Residency: Dartmouth-Hitchcock Medical Center (2008)
Fellowship: Critical Care, Dartmouth-Hitchcock Medical Center (2009)

Board certification: Anesthesiology (2009) Critical Care (2010)

NAP anesthesiologist since: 2009

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Robert Pellicer, DO

Anesthesiologist

Robert Pellicer, DO
Anesthesiologist

Medical education:
Medical school: Western Univ of Health Science, COMP-NW (2018)
Residency: University of Wisconsin Hospitals & Clinics (2022)

Fellowship: Regional and Acute Pain, Univ of Wisconsin (2023)

Board certification: Anesthesiology (2023) 

NAP anesthesiologist since: 2023

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Dorothy Ann Penaloza, MD

Anesthesiologist

Dorothy Ann Penaloza, MD
Anesthesiologist
Medical education: Medical school: Oregon Health and Science University (2004) Residency: Virginia Mason Medical Center (2008) Board certification: Anesthesiology (2009) NAP anesthesiologist since: 2008
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Carly Porat, MD

Anesthesiologist

Carly Porat, MD
Anesthesiologist

Medical education:
Medical school: The Technion Israel Institute of Technology American Medical School (2019)
Residency: University of Rochester Medical Center (2023)

Board certification: Anesthesiology (2024)

NAP anesthesiologist since: 2023

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Alex Raiskin, MD

Anesthesiologist

Alex Raiskin, MD
Anesthesiologist

Medical education:
Medical school: Siberian State Medical University (1996)
Residency: Wayne State University/Detroit Medical Center (2007)

Board certification: Anesthesiology (2008)

NAP anesthesiologist since: 2007

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Michael Roll, MD

Anesthesiologist

Michael Roll, MD
Anesthesiologist
Medical education: Medical school: Wake Forest School of Medicine (2015) Residency: Virginia Mason Medical Center (2019) Fellowship: Virginia Mason Medical Center (2020) Board certification: Anesthesiology (2023) NAP anesthesiologist since: 2020
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Andrew Rushton, MD

Anesthesiologist

Andrew Rushton, MD
Anesthesiologist

Medical education:
Medical school: University of Oklahoma School of Medicine (2000)
Residency: Oregon Health and Science University (2004)

Board certification: Anesthesiology (2006)

NAP anesthesiologist since: 2004

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Alexander Ryder, DO

Anesthesiologist

Alexander Ryder, DO
Anesthesiologist

Medical education:
Medical school: Pacific Northwest University of Health Sciences (2019)
Residency: Rush University Medical Center (2023)

Board certification: Anesthesiology (In ABA exam system)

NAP anesthesiologist since: 2023

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Patrick Salisbury, MD

Anesthesiologist

Patrick Salisbury, MD
Anesthesiologist
Medical education: Medical school: University of Cincinnati, College of Medicine (2003) Residency: Virginia Mason Medical Center (2007) Board certification: Anesthesiology (2008) NAP anesthesiologist since: 2007
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Adrienne Samar, MD

Anesthesiologist

Adrienne Samar, MD
Anesthesiologist

Medical education:
Medical school: University of Iowa Carver College of Medicine (2013)
Residency: University of Iowa Hospitals and Clinics (2017)
Fellowship: Critical Care, University of Iowa Hospitals and Clinics (2018)

Board certification: Anesthesiology (In the ABA exam system) Critical Care

NAP anesthesiologist since: 2018

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Mark Shillington, MD

Anesthesiologist

Mark Shillington, MD
Anesthesiologist

Medical education:
Medical school: University of Texas Southwestern Medical School (2010)
Residency: University of Utah (2014)
Fellowship: Perioperative Echocardiography, University of Utah (2015)

Board certification: Anesthesiology (2015)

NAP anesthesiologist since: 2015

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Rick Siel, Jr., MD

Anesthesiologist

Rick Siel, Jr., MD
Anesthesiologist
Medical education: Medical school: University of Iowa Carver College of Medicine (2015) Residency: University of Minnesota (2019) Fellowship: Critical Care, University of Minnesota (2020) Board certification: Anesthesiology (In the ABA Exam System) NAP anesthesiologist since: 2020
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Andrew Sikorsky, MD

Anesthesiologist

Andrew Sikorsky, MD
Anesthesiologist

Medical education:
Medical school: Creighton University School of Medicine (2019)
Residency: UCLA (2023)

Board certification: Anesthesiology (In ABA exam system)

NAP anesthesiologist since: 2023

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Ryan Smith, MD

Anesthesiologist

Ryan Smith, MD
Anesthesiologist

Medical education:
Medical school: University of Vermont Larner College of Medicine (2012)
Residency: Cooperman Barnabas Medical Center (2016)

Fellowship: Critical Care, Univ of South Carolina (2017)

Board certification: Anesthesiology (2017) Critical Care (2019)

NAP anesthesiologist since: 2023

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Alex Shune, MD

Anesthesiologist

Alex Shune, MD
Anesthesiologist

Medical education:
Medical school: The Ohio State University School of Medicine (2009)
Residency: University of Iowa (2013)
Fellowship: Cardiothoracic Anesthesia, University of Iowa (2014)

Board certification: Anesthesiology (2014)

NAP anesthesiologist since: 2014

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Steven Surrett, MD

Anesthesiologist

Steven Surrett, MD
Anesthesiologist
Medical education: Medical school: University of Arizona College of Medicine (2010) Residency: Upstate Medical University (2015) Fellowship: Pain Medicine, Upstate Medical University (2016) Board certification: Anesthesiology 2016, Pain Medicine 2017 NAP anesthesiologist since: 2019
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Brian St. George, MD

Anesthesiologist

Brian St. George, MD
Anesthesiologist

Medical education:
Medical school: Oregon Health and Science University (2000)
Residency: University of New Mexico (2004)

Board certification: Anesthesiology (2005)

NAP anesthesiologist since: 2004

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Todd Tritch, MD

Anesthesiologist

Todd Tritch, MD
Anesthesiologist

Medical education:
Medical school: Oregon Health and Science University (1992)
Residency: North Carolina Baptist Hospital (1996)
Fellowship: Virginia Mason Medical Center (1997)

Board certification: Anesthesiology (1998)

NAP anesthesiologist since: 1997

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Jonathan Williams, MD

Anesthesiologist

Jonathan Williams, MD
Anesthesiologist

Medical education:
Medical school: Oregon Health and Science University (2008)
Residency: University of Kansas (2012)

Board certification: Anesthesiology (2013)

NAP anesthesiologist since: 2012

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John Traul, MD

Anesthesiologist

John Traul, MD
Anesthesiologist
Medical education: Medical school: Medical College of Ohio (1994) Residency: Fletcher Allen Healthcare (1998) Board certification: Anesthesiology (1999) NAP anesthesiologist since: 2022
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Dean Withroder, MD

Anesthesiologist

Dean Withroder, MD
Anesthesiologist

Medical education:
Medical school: University of Utah (2019)
Residency: Virginia Mason Medical Center (2023)

Board certification: Anesthesiology (In ABA exam system)

NAP anesthesiologist since: 2023

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Ken Woodward, MD

Anesthesiologist

Ken Woodward, MD
Anesthesiologist

Medical education:

Medical school: University of Pittsburgh School of Medicine (1999)

Residency: Mayo Graduate School of Medicine (2003)

Board certification: Anesthesiology (2004 & 2015)

NAP anesthesiologist since: 2007

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Martin Velasquez, MD

Anesthesiologist

Martin Velasquez, MD
Anesthesiologist
Medical education: Medical school: Saba University School of Medicine (2017) Residency: SUNY Downstate Medical Center (2021) Fellowship: Acute Pain, The Ohio State University (2022) Board certification: Anesthesiology (2022) NAP anesthesiologist since: 2022
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Simon Yang, MD

Anesthesiologist

Simon Yang, MD
Anesthesiologist

Medical education:
Medical school: Oregon Health & Science University (2014)
Residency: University of Rochester Medical Center (2018)

Board certification: Anesthesiology (In the ABA exam system)

NAP anesthesiologist since: 2018

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Caroline Zawilski, MD

Anesthesiologist

Caroline Zawilski, MD
Anesthesiologist

Medical education:
Medical school: University of Medicine and Dentistry of New Jersey (RWJ) (2011)
Residency: University of Rochester, Strong Memorial Hospital (2015)

Board certification: Anesthesiology (2017)

NAP anesthesiologist since: 2021

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Billy Zhang, MD

Anesthesiologist

Billy Zhang, MD
Anesthesiologist

Medical education:
Medical school: Quinnipiac University (2018)
Residency: University of  California Davis (2022)

Board certification: Anesthesiology (In the ABA exam system) 

NAP anesthesiologist since: 2022

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Alix Zuleta-Alarcon, MD

Anesthesiologist

Alix Zuleta-Alarcon, MD
Anesthesiologist

Medical education:
Medical school: Universidad de los Andes, Bogota, Colombia (2013)
Residency: Ohio State University (2021)
Fellowship: Adult Cardiothoracic, Ohio State University (2022)

Board certification: Anesthesiology (2022)

NAP anesthesiologist since: 2022

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Anesthesia Interview: 541-222-3154
Post Operative Issues: 541-222-7522
Billing Office: 541-686-9551

Billing Office: 939 Harlow Rd, Suite 110
Springfield OR 97477
Hospital Office: 3333 Riverbend Dr,
Springfield OR 97477