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Informational purposes only — not medical advice. Always consult a professional. Data updated weekly.

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Best Internal Doctors in Flagstaff, AZ | NPI Telehealth
Home/Arizona/Flagstaff/Internal Doctors
LOCAL SPECIALTY PROTOCOL 2026

Internal Doctors
IN Flagstaff.

Find and book top-rated Internal Medicine specialists in Flagstaff, AZ. Access NPI credentials sourced from federal records and virtual care availability.

SPECIALISTS

Active internal doctors in Flagstaff jurisdiction.

21 ENTRIES FOUND
NPI: 1992896781
VIRTUAL ACTIVE

SHERRILL WELLER, D.O.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
OTHER (1997)
20+ Years Exp.
ACCESS PROFILE
NPI: 1891008884
VIRTUAL ACTIVE

JOEL TERRIQUEZ, M.D.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
OTHER (2005)
16+ Years Exp.
ACCESS PROFILE
NPI: 1861425829
VIRTUAL ACTIVE

SARAH CONLON, MD

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
UNIVERSITY OF VERMONT COLLEGE OF MEDICINE (2003)
20+ Years Exp.
ACCESS PROFILE
NPI: 1851824163
VIRTUAL ACTIVE

MATTHEW STUART, DO

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
DES MOINES UNIVERSITY OF OSTEOPATHIC MEDICINE AND HEALTH SCIENCES (2017)
9+ Years Exp.
ACCESS PROFILE
NPI: 1740494665
VIRTUAL ACTIVE

BRIDGET STIEGLER, D.O.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
ARIZONA COLLEGE OF OSTEOPATHIC MEDICINE MID WESTERN UNIVERSITY (2006)
19+ Years Exp.
ACCESS PROFILE
NPI: 1679709273
VIRTUAL ACTIVE

MICHAEL MORTENSEN, DO

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
ARIZONA COLLEGE OF OSTEOPATHIC MEDICINE MID WESTERN UNIVERSITY (2009)
17+ Years Exp.
ACCESS PROFILE
NPI: 1659351187
VIRTUAL ACTIVE

RODNEY ENGEL, M.D.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
ALBERT EINSTEIN COLLEGE OF MEDICINE OF YESHIVA UNIVERSITY (2005)
20+ Years Exp.
ACCESS PROFILE
NPI: 1639551526
VIRTUAL ACTIVE

WEI XIANG WONG

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
OTHER (2011)
11+ Years Exp.
ACCESS PROFILE
NPI: 1609950500
VIRTUAL ACTIVE

MICHAEL REIDY, MD

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
GEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE (1990)
20+ Years Exp.
ACCESS PROFILE
NPI: 1497866495
VIRTUAL ACTIVE

LAUREN BREIHAN, M.D.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
UNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL SCHOOL AT DALLAS (1982)
20+ Years Exp.
ACCESS PROFILE
NPI: 1497852404
VIRTUAL ACTIVE

ANG CHEN, M.D.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
OTHER (1990)
20+ Years Exp.
ACCESS PROFILE
NPI: 1427037357
VIRTUAL ACTIVE

DITHI SHETTY, MD

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
OTHER (1993)
20+ Years Exp.
ACCESS PROFILE
NPI: 1366416869
VIRTUAL ACTIVE

KEITH RYAN, MD

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
UNIVERSITY OF MISSOURI, COLUMBIA SCHOOL OF MEDICINE (1991)
20+ Years Exp.
ACCESS PROFILE
NPI: 1356370571
VIRTUAL ACTIVE

DAVID KECKICH, M.D.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
UNIVERSITY OF MARYLAND SCHOOL OF MEDICINE (2006)
20+ Years Exp.
ACCESS PROFILE
NPI: 1326265893
VIRTUAL ACTIVE

OMAR WANI, MD

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
OTHER (1997)
19+ Years Exp.
ACCESS PROFILE
NPI: 1316995699
VIRTUAL ACTIVE

PETER MATHERN, M.D.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
OTHER (1990)
20+ Years Exp.
ACCESS PROFILE
NPI: 1306145859
VIRTUAL ACTIVE

ALEXANDER HU, D.O.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
OTHER (2011)
15+ Years Exp.
ACCESS PROFILE
NPI: 1295977718
VIRTUAL ACTIVE

CHRISTOPHER MUELLER, M.D.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
UNIVERSITY OF WISCONSIN SCHOOL OF MEDICINE (2009)
17+ Years Exp.
ACCESS PROFILE
NPI: 1275981458
VIRTUAL ACTIVE

WINA YOUSMAN, M.D.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
OTHER (2010)
10+ Years Exp.
ACCESS PROFILE
NPI: 1114950185
VIRTUAL ACTIVE

MATTHEW GEMBALA, M.D., M.P.H.

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
UNIVERSITY OF ARIZONA COLLEGE OF MEDICINE (2003)
20+ Years Exp.
ACCESS PROFILE
NPI: 1023167384
VIRTUAL ACTIVE

CRAIG PETERS, DO

Internal Medicine

NPI DATA 2026
Flagstaff, AZ
OHIO UNIVERSITY, COLLEGE OF OSTEOPATHIC MEDICINE (2002)
19+ Years Exp.
ACCESS PROFILE

Local Discovery Protocol

Navigating healthcare in Flagstaff, AZ requires finding the right expert. A highly qualified internal medicine is crucial for proper diagnosis and long-term care management.

  • NPI Credentials: Active NPI status and valid AZ state licensing sourced from federal records.
  • Virtual Options: Encrypted telehealth consultations available for remote triage.
All Providers in ArizonaNationwide Internal Medicines