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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: 1457357865
VIRTUAL ACTIVE

Michael Zachek, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Bowling Green, KY
Georgetown University School of Medicine (1977)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457356917
VIRTUAL ACTIVE

Jeffrey Brian Hoag, MD, MS

Internal Medicine

CREDENTIALS VERIFIED 2026
Philadelphia, PA
Virginia Commonwealth University School of Medicine (2001)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457356677
VIRTUAL ACTIVE

Margaret A Colleran, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Riverview, FL
UNIVERSITY OF SOUTH FLORIDA COLLEGE OF MEDICINE (1993)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457355232
VIRTUAL ACTIVE

Joseph W. Gross, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Newburyport, MA
Northwestern University Feinberg School of Medicine (2000)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457355208
VIRTUAL ACTIVE

German Iosif, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Haverhill, MA
OFFICIAL REGISTRY DATA
21+ Years Exp.
ACCESS PROFILE
NPI: 1457354771
VIRTUAL ACTIVE

Fulvio Mazzucchi, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Riverhead, NY
OFFICIAL REGISTRY DATA
21+ Years Exp.
ACCESS PROFILE
NPI: 1457354581
VIRTUAL ACTIVE

Arvind Ramachandrarao Cavale, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Feasterville Trevose, PA
OFFICIAL REGISTRY DATA
21+ Years Exp.
ACCESS PROFILE
NPI: 1457354474
VIRTUAL ACTIVE

SHAHINA JAVEED, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
HOLIDAY, FL
OTHER (1987)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457354169
VIRTUAL ACTIVE

David G. Cziner, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
White Plains, NY
NYU Grossman School of Medicine (1986)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457352783
VIRTUAL ACTIVE

Patrick Joseph S Alix, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Glendora, CA
OFFICIAL REGISTRY DATA
21+ Years Exp.
ACCESS PROFILE
NPI: 1457352577
VIRTUAL ACTIVE

RAVINDER K MACHRA, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
DYERSBURG, TN
OTHER (1994)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457352395
VIRTUAL ACTIVE

Robert Vissing, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Towson, MD
University of Maryland School of Medicine (1983)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457352338
VIRTUAL ACTIVE

Christopher Teitleman, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Braintree, MA
Tufts University School of Medicine (1993)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457349771
VIRTUAL ACTIVE

Hyun Sue Kim, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Colorado Springs, CO
University of Arizona College of Medicine (1992)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457349706
VIRTUAL ACTIVE

Michael Smar, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Freeport, NY
OFFICIAL REGISTRY DATA
21+ Years Exp.
ACCESS PROFILE
NPI: 1457349177
VIRTUAL ACTIVE

John Hwang

Internal Medicine

CREDENTIALS VERIFIED 2026
Harrington Park, NJ
OFFICIAL REGISTRY DATA
21+ Years Exp.
ACCESS PROFILE
NPI: 1457348088
VIRTUAL ACTIVE

Glen A. Reznikoff, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Fairfield, CT
Saint Louis University School of Medicine (1989)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457347767
VIRTUAL ACTIVE

Howard Weintraub, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
New York, NY
NYU Grossman School of Medicine (1976)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457347023
VIRTUAL ACTIVE

James Samuel, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Norwalk, CT
CHICAGO COLLEGE OF MEDICINE AND SURGERY (2001)
21+ Years Exp.
ACCESS PROFILE
NPI: 1457346967
VIRTUAL ACTIVE

John R Wallace, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Marquette, MI
Louisiana State University School of Medicine in New Orleans (1985)
21+ 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