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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 Fountain Valley, CA | NPI Telehealth
Home/California/Fountain Valley/Internal Doctors
LOCAL SPECIALTY PROTOCOL 2026

Internal Doctors
IN Fountain Valley.

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

SPECIALISTS

Active internal doctors in Fountain Valley jurisdiction.

45 ENTRIES FOUND
NPI: 1982801718
VIRTUAL ACTIVE

SANJIV PATEL, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (2000)
19+ Years Exp.
ACCESS PROFILE
NPI: 1942311832
VIRTUAL ACTIVE

CHRIS TSIMEREKIS, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
UNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE (1993)
20+ Years Exp.
ACCESS PROFILE
NPI: 1932466125
VIRTUAL ACTIVE

JOSE LUIS ARANEZ, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (2012)
14+ Years Exp.
ACCESS PROFILE
NPI: 1912956053
VIRTUAL ACTIVE

GHAROON PANAHI, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1970)
20+ Years Exp.
ACCESS PROFILE
NPI: 1902040009
VIRTUAL ACTIVE

AFSANEH HAFTBARADARAN MOHAMMADI, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (2004)
17+ Years Exp.
ACCESS PROFILE
NPI: 1891734828
VIRTUAL ACTIVE

BABAK FIROOZI, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1995)
20+ Years Exp.
ACCESS PROFILE
NPI: 1801099593
VIRTUAL ACTIVE

BAO BUI, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
PENNSYLVANIA STATE UNIVERSITY COLLEGE OF MEDICINE (2007)
19+ Years Exp.
ACCESS PROFILE
NPI: 1750587143
VIRTUAL ACTIVE

AMANDA DONOHUE, D.O.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
NOVA SOUTHEASTERN COLLEGE OF OSTEO MEDICINE (2005)
19+ Years Exp.
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NPI: 1740924059
VIRTUAL ACTIVE

DON PHUNG, DO

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (2022)
4+ Years Exp.
ACCESS PROFILE
NPI: 1730146937
VIRTUAL ACTIVE

SANDEEP DANG, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (2001)
20+ Years Exp.
ACCESS PROFILE
NPI: 1720048291
VIRTUAL ACTIVE

JOHN WANG, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
UNIVERSITY OF TEXAS MEDICAL SCHOOL AT SAN ANTONIO (1999)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689786139
VIRTUAL ACTIVE

SAMARJIT SINGH, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1995)
20+ Years Exp.
ACCESS PROFILE
NPI: 1679557797
VIRTUAL ACTIVE

DUKE NGUYEN, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1996)
21+ Years Exp.
ACCESS PROFILE
NPI: 1669492724
VIRTUAL ACTIVE

KETAN BHAKTA, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
UNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE (1989)
20+ Years Exp.
ACCESS PROFILE
NPI: 1649298852
VIRTUAL ACTIVE

THOMAS ASCIUTO

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
NEW YORK UNIVERSITY SCHOOL OF MEDICINE (1989)
20+ Years Exp.
ACCESS PROFILE
NPI: 1639517808
VIRTUAL ACTIVE

ALAN CANTILLEP, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
MICHIGAN STATE UNIVERSITY COLLEGE OF HUMAN MEDICINE (2011)
13+ Years Exp.
ACCESS PROFILE
NPI: 1619110830
VIRTUAL ACTIVE

ERIC PANAHI, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (2007)
17+ Years Exp.
ACCESS PROFILE
NPI: 1598721227
VIRTUAL ACTIVE

MIKIO TACHIBANA, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1978)
20+ Years Exp.
ACCESS PROFILE
NPI: 1598296147
VIRTUAL ACTIVE

CHRISTOPHER BERG, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
UNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE (2017)
9+ Years Exp.
ACCESS PROFILE
NPI: 1598055709
VIRTUAL ACTIVE

JERRY HSIEH, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
VIRGINIA COMMONWEALTH UNIVERSITY, SCHOOL OF MEDICINE (2011)
15+ Years Exp.
ACCESS PROFILE
NPI: 1578560884
VIRTUAL ACTIVE

LALITA KOMANAPALLI, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
LOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE (1996)
21+ Years Exp.
ACCESS PROFILE
NPI: 1558771188
VIRTUAL ACTIVE

SINA MILANI, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1996)
12+ Years Exp.
ACCESS PROFILE
NPI: 1558379503
VIRTUAL ACTIVE

JOGINDER JODHKA, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1979)
20+ Years Exp.
ACCESS PROFILE
NPI: 1528097730
VIRTUAL ACTIVE

AHMED AL-SADEK, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1997)
20+ Years Exp.
ACCESS PROFILE
NPI: 1457329179
VIRTUAL ACTIVE

HOANG NGUYEN, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1988)
20+ Years Exp.
ACCESS PROFILE
NPI: 1447341409
VIRTUAL ACTIVE

VINEY SONI, M.D

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1968)
20+ Years Exp.
ACCESS PROFILE
NPI: 1437285095
VIRTUAL ACTIVE

ARVIND NIRULA, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1993)
19+ Years Exp.
ACCESS PROFILE
NPI: 1407964976
VIRTUAL ACTIVE

TARUN MARWAHA, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1996)
20+ Years Exp.
ACCESS PROFILE
NPI: 1396088977
VIRTUAL ACTIVE

LIZHOU HUANG, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
NORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL (2013)
13+ Years Exp.
ACCESS PROFILE
NPI: 1396049029
VIRTUAL ACTIVE

SARAH ELSAYED, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (2003)
15+ Years Exp.
ACCESS PROFILE
NPI: 1376046185
VIRTUAL ACTIVE

LONG HUA, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
UNIVERSITY OF COLORADO SCHOOL OF MEDICINE, AURORA (2018)
8+ Years Exp.
ACCESS PROFILE
NPI: 1316177462
VIRTUAL ACTIVE

PHONG BUI, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
UNIVERSITY OF CALIFORNIA, IRVINE, CALIFORNIA COLLEGE OF MEDICINE (2006)
17+ Years Exp.
ACCESS PROFILE
NPI: 1255677134
VIRTUAL ACTIVE

ZAVIER AHMED, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (2012)
14+ Years Exp.
ACCESS PROFILE
NPI: 1235664434
VIRTUAL ACTIVE

JESSICA SCHACHTER, D.O.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
LAKE ERIE COLLEGE OF OSTEOPATHIC MEDICINE, ERIE (2017)
9+ Years Exp.
ACCESS PROFILE
NPI: 1225244775
VIRTUAL ACTIVE

COLLIN VU, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
UNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE (2004)
19+ Years Exp.
ACCESS PROFILE
NPI: 1184893133
VIRTUAL ACTIVE

TRACY TRAN, DO

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (2007)
18+ Years Exp.
ACCESS PROFILE
NPI: 1114014438
VIRTUAL ACTIVE

AJIT SAWHNEY, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1968)
20+ Years Exp.
ACCESS PROFILE
NPI: 1104886241
VIRTUAL ACTIVE

HOANG LE, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
HAHNEMANN UNIVERSITY COLLEGE OF MEDICINE (1997)
20+ Years Exp.
ACCESS PROFILE
NPI: 1104822535
VIRTUAL ACTIVE

IHONG CHEN, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
UNIVERSITY OF TEXAS MEDICAL SCHOOL AT SAN ANTONIO (1988)
21+ Years Exp.
ACCESS PROFILE
NPI: 1083626212
VIRTUAL ACTIVE

ELIZABETH NGHIEM, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
TEMPLE UNIVERSITY SCHOOL OF MEDICINE (1995)
20+ Years Exp.
ACCESS PROFILE
NPI: 1073963583
VIRTUAL ACTIVE

THANH CAO, D.O.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (2016)
10+ Years Exp.
ACCESS PROFILE
NPI: 1033565338
VIRTUAL ACTIVE

YU-MING NI, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
NEW YORK MEDICAL COLLEGE (2016)
10+ Years Exp.
ACCESS PROFILE
NPI: 1033290887
VIRTUAL ACTIVE

SATINDER SWAROOP, MD

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (1965)
20+ Years Exp.
ACCESS PROFILE
NPI: 1013029065
VIRTUAL ACTIVE

JENNIFER WONG, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
UNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE (2002)
20+ Years Exp.
ACCESS PROFILE
NPI: 1003131228
VIRTUAL ACTIVE

SAJEET SAWHNEY, M.D.

Internal Medicine

NPI DATA 2026
Fountain Valley, CA
OTHER (2010)
16+ Years Exp.
ACCESS PROFILE

Local Discovery Protocol

Navigating healthcare in Fountain Valley, CA 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 CA state licensing sourced from federal records.
  • Virtual Options: Encrypted telehealth consultations available for remote triage.
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