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© 2026 NPI Telehealth

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CMS Source

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

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Online Internal Medicine Doctors | Telehealth & Virtual Visits | NPI Telehealth | NPI Telehealth
SPECIALTY DISCOVERY ACTIVE 2026

Internal Medicine.

Find and book verified Internal Medicine specialists. Access NPI credentials, office locations, and virtual care availability.

VERIFIED SPECIALISTS

Active medical practitioners in Internal Medicine clinical focus.

62,216 ENTRIES FOUND
NPI: 1689765521
VIRTUAL ACTIVE

Blair Seth Lewis, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
New York, NY
OFFICIAL REGISTRY DATA
20+ Years Exp.
ACCESS PROFILE
NPI: 1689765059
VIRTUAL ACTIVE

Van E. Lomis, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Baltimore, MD
OFFICIAL REGISTRY DATA
20+ Years Exp.
ACCESS PROFILE
NPI: 1689764706
VIRTUAL ACTIVE

Robert S Zimmerman, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Cleveland, OH
Johns Hopkins University School of Medicine (1981)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689764466
VIRTUAL ACTIVE

Neal Jeffrey Winzelberg, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Brick, NJ
SUNY Downstate Health Sciences University (1984)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689764367
VIRTUAL ACTIVE

Whitney Woodmansee, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Gainesville, FL
UNIVERSITY OF COLORADO SCHOOL OF MEDICINE, DENVER (1993)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689764086
VIRTUAL ACTIVE

Todd W Gienapp, D.O.

Internal Medicine

CREDENTIALS VERIFIED 2026
Vancouver, WA
A.T. Still University Kirksville College of Osteopathic Medicine (1998)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689763971
VIRTUAL ACTIVE

Xingjia Hua, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Princeton, NJ
OFFICIAL REGISTRY DATA
20+ Years Exp.
ACCESS PROFILE
NPI: 1689760951
VIRTUAL ACTIVE

Tom A Tassakis, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Vineland, NJ
OFFICIAL REGISTRY DATA
20+ Years Exp.
ACCESS PROFILE
NPI: 1689758690
VIRTUAL ACTIVE

MARISSA ROCOURT, M.D

Internal Medicine

CREDENTIALS VERIFIED 2026
MELBOURNE, FL
OTHER (1996)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689758054
VIRTUAL ACTIVE

Sarah V Mcbee, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Monroe, GA
Medical College of Georgia at Augusta University (1983)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689756595
VIRTUAL ACTIVE

Amanda D. Ryan, DO

Internal Medicine

CREDENTIALS VERIFIED 2026
Carlsbad, NM
OFFICIAL REGISTRY DATA
20+ Years Exp.
ACCESS PROFILE
NPI: 1689756108
VIRTUAL ACTIVE

Frederick K Askari, MD, PHD

Internal Medicine

CREDENTIALS VERIFIED 2026
Ann Arbor, MI
JS WEILL MEDICAL COLLEGE, CORNELL UNIVERSITY (1987)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689755365
VIRTUAL ACTIVE

John M Wallmark, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Rockville, MD
HAHNEMANN UNIVERSITY COLLEGE OF MEDICINE (1992)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689755001
VIRTUAL ACTIVE

Henny H Billett, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Bronx, NY
Icahn School of Medicine at Mount Sinai (1974)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689752453
VIRTUAL ACTIVE

Douglas F. Epperson, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Oakland, CA
University of Iowa Roy J. and Lucille A. Carver College of Medicine (1995)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689752412
VIRTUAL ACTIVE

Eric J. Crisostomo, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Fairfield, CA
New York Medical College (1997)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689751471
VIRTUAL ACTIVE

Maria Jose Silveira, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Ann Arbor, MI
Renaissance School of Medicine at Stony Brook University (1996)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689751331
VIRTUAL ACTIVE

Jessica A Perini, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Morgantown, WV
University of Pittsburgh School of Medicine (2001)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689749400
VIRTUAL ACTIVE

Alan L Hinderliter, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Chapel Hill, NC
Washington University School of Medicine in St. Louis (1981)
20+ Years Exp.
ACCESS PROFILE
NPI: 1689744120
VIRTUAL ACTIVE

Muhammad J Memon, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Compton, CA
OFFICIAL REGISTRY DATA
20+ Years Exp.
ACCESS PROFILE
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Why Choose a Verified Internal Medicine Specialist?

Selecting a Internal Medicine is a personal decision that impacts your long-term health. Whether you are seeking treatment for a specific condition or looking for a second opinion, we provide access to a verified list of practicing specialists.

We recommend reviewing clinical background, years of practice, and verified patient experiences before scheduling your visit. Many Internal Medicines now offer telehealth services, allowing you to receive expert medical advice from the comfort of your home.

Institutional Data Integrity

Every provider on NPI Telehealth is verified against the National Plan and Provider Enumeration System (NPPES). We ensure that you connect with licensed, active professionals who meet federal clinical standards.

100% VERIFIED CREDENTIALS
REAL-TIME REGISTRY UPDATES