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

Internal Doctors
IN Castro Valley.

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

SPECIALISTS

Active internal doctors in Castro Valley jurisdiction.

24 ENTRIES FOUND
NPI: 1932325446
VIRTUAL ACTIVE

JEFFREY SINGERMAN, M.D.

Internal Medicine

NPI DATA 2026
Castro Valley, CA
GEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE (2005)
19+ Years Exp.
ACCESS PROFILE
NPI: 1922209436
VIRTUAL ACTIVE

NALURPORN CHOKRUNGVARANON, M.D.

Internal Medicine

NPI DATA 2026
Castro Valley, CA
OTHER (2004)
19+ Years Exp.
ACCESS PROFILE
NPI: 1770547192
VIRTUAL ACTIVE

NAVDEEP SINGH, MD

Internal Medicine

NPI DATA 2026
Castro Valley, CA
OTHER (1996)
20+ Years Exp.
ACCESS PROFILE
NPI: 1750524575
VIRTUAL ACTIVE

JENNIFER CASEY

Internal Medicine

NPI DATA 2026
Castro Valley, CA
OTHER (2009)
17+ Years Exp.
ACCESS PROFILE
NPI: 1740476761
VIRTUAL ACTIVE

KATHRYN WELTY, MD

Internal Medicine

NPI DATA 2026
Castro Valley, CA
VANDERBILT UNIVERSITY SCHOOL OF MEDICINE (2007)
19+ Years Exp.
ACCESS PROFILE
NPI: 1740243930
VIRTUAL ACTIVE

RAHUL RISHI, M.D.

Internal Medicine

NPI DATA 2026
Castro Valley, CA
OTHER (2000)
20+ Years Exp.
ACCESS PROFILE
NPI: 1699960815
VIRTUAL ACTIVE

SATYA ALLAPARTHI, MD

Internal Medicine

NPI DATA 2026
Castro Valley, CA
OTHER (1998)
19+ Years Exp.
ACCESS PROFILE
NPI: 1699724484
VIRTUAL ACTIVE

NABIL ABUDAYEH, MD

Internal Medicine

NPI DATA 2026
Castro Valley, CA
CHICAGO COLLEGE OF MEDICINE AND SURGERY (1986)
20+ Years Exp.
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NPI: 1558780825
VIRTUAL ACTIVE

ARPEET SHAH, M.D.

Internal Medicine

NPI DATA 2026
Castro Valley, CA
STANFORD UNIVERSITY SCHOOL OF MEDICINE (2014)
12+ Years Exp.
ACCESS PROFILE
NPI: 1548283005
VIRTUAL ACTIVE

RICHARD HO, M. D.

Internal Medicine

NPI DATA 2026
Castro Valley, CA
UNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE (1974)
20+ Years Exp.
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NPI: 1528393063
VIRTUAL ACTIVE

IRENE DY, MD

Internal Medicine

NPI DATA 2026
Castro Valley, CA
OTHER (2003)
17+ Years Exp.
ACCESS PROFILE
NPI: 1467731828
VIRTUAL ACTIVE

GENE-YUAN CHANG, MD

Internal Medicine

NPI DATA 2026
Castro Valley, CA
BOSTON UNIVERSITY SCHOOL OF MEDICINE (2009)
15+ Years Exp.
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NPI: 1467618454
VIRTUAL ACTIVE

FARNOOSH FARROKHI

Internal Medicine

NPI DATA 2026
Castro Valley, CA
OTHER (2002)
18+ Years Exp.
ACCESS PROFILE
NPI: 1376569475
VIRTUAL ACTIVE

MARCIA PECK, MD

Internal Medicine

NPI DATA 2026
Castro Valley, CA
UNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE (2000)
20+ Years Exp.
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NPI: 1356737530
VIRTUAL ACTIVE

ADITYA VAZE, MD

Internal Medicine

NPI DATA 2026
Castro Valley, CA
ALBANY MEDICAL COLLEGE OF UNION UNIVERSITY (2015)
11+ Years Exp.
ACCESS PROFILE
NPI: 1346777026
VIRTUAL ACTIVE

NITIN TANDAN

Internal Medicine

NPI DATA 2026
Castro Valley, CA
OTHER (2017)
9+ Years Exp.
ACCESS PROFILE
NPI: 1316977978
VIRTUAL ACTIVE

JEFFREY WEST, MD

Internal Medicine

NPI DATA 2026
Castro Valley, CA
UNIVERSITY OF CALIFORNIA, SAN FRANCISCO SCHOOL OF MEDICINE (1988)
20+ Years Exp.
ACCESS PROFILE
NPI: 1295363752
VIRTUAL ACTIVE

VINEETHA RANGARAJAN, DO

Internal Medicine

NPI DATA 2026
Castro Valley, CA
MICHIGAN STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE (2020)
6+ Years Exp.
ACCESS PROFILE
NPI: 1295296275
VIRTUAL ACTIVE

DIANA HESS, MD

Internal Medicine

NPI DATA 2026
Castro Valley, CA
UNIV OF CENTRAL FLORIDA, COLLEGE OF MEDICINE (2019)
7+ Years Exp.
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NPI: 1285811489
VIRTUAL ACTIVE

NIDHI JOHRI, M.D

Internal Medicine

NPI DATA 2026
Castro Valley, CA
OTHER (2000)
18+ Years Exp.
ACCESS PROFILE
NPI: 1184155566
VIRTUAL ACTIVE

STEPHEN MORRIS, MD

Internal Medicine

NPI DATA 2026
Castro Valley, CA
TULANE UNIVERSITY SCHOOL OF MEDICINE (2017)
9+ Years Exp.
ACCESS PROFILE
NPI: 1164818118
VIRTUAL ACTIVE

RAJBIR SIDHU, M.D.

Internal Medicine

NPI DATA 2026
Castro Valley, CA
DREXEL UNIVERSITY COLLEGE OF MEDICINE (2015)
11+ Years Exp.
ACCESS PROFILE
NPI: 1154541423
VIRTUAL ACTIVE

NITIN JOSHI, M.D.

Internal Medicine

NPI DATA 2026
Castro Valley, CA
OTHER (1999)
19+ Years Exp.
ACCESS PROFILE
NPI: 1073684429
VIRTUAL ACTIVE

LING XU, M.D.

Internal Medicine

NPI DATA 2026
Castro Valley, CA
OTHER (1983)
20+ Years Exp.
ACCESS PROFILE

Local Discovery Protocol

Navigating healthcare in Castro 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.
All Providers in CaliforniaNationwide Internal Medicines