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© 2026 NPI Telehealth

US Registry Operational
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: 1093731267
VIRTUAL ACTIVE

Venkata Ramana Aligeti, M.D

Internal Medicine

CREDENTIALS VERIFIED 2026
Plano, TX
OFFICIAL REGISTRY DATA
20+ Years Exp.
ACCESS PROFILE
NPI: 1093731143
VIRTUAL ACTIVE

Eric A Collisson, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Seattle, WA
David Geffen School of Medicine at UCLA (2002)
20+ Years Exp.
ACCESS PROFILE
NPI: 1093730772
VIRTUAL ACTIVE

Danilo Joson Calderon, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Southgate, KY
OFFICIAL REGISTRY DATA
20+ Years Exp.
ACCESS PROFILE
NPI: 1093730442
VIRTUAL ACTIVE

Shyamsundar Rajan, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Silver Spring, MD
OFFICIAL REGISTRY DATA
20+ Years Exp.
ACCESS PROFILE
NPI: 1093730269
VIRTUAL ACTIVE

Catherine Nicastri, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
East Setauket, NY
Renaissance School of Medicine at Stony Brook University (1998)
20+ Years Exp.
ACCESS PROFILE
NPI: 1093729436
VIRTUAL ACTIVE

RAMESH D BAMBHANIA, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
APPLE VALLEY, CA
OTHER (1985)
20+ Years Exp.
ACCESS PROFILE
NPI: 1093728909
VIRTUAL ACTIVE

Margie Lim, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
San Francisco, CA
MEDICAL COLLEGE OF PENNSYLVANIA (1995)
20+ Years Exp.
ACCESS PROFILE
NPI: 1093728859
VIRTUAL ACTIVE

Avery Wilmanns, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Santa Barbara, CA
Keck School of Medicine of USC (1994)
20+ Years Exp.
ACCESS PROFILE
NPI: 1093727950
VIRTUAL ACTIVE

Paul F Dellaripa, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Boston, MA
UNIVERSITY OF CONNECTICUT SCHOOL OF MEDICINE (1989)
20+ Years Exp.
ACCESS PROFILE
NPI: 1093726879
VIRTUAL ACTIVE

Bruce N Brent, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
San Francisco, CA
Boston University Chobanian & Avedisian School of Medicine (1975)
20+ Years Exp.
ACCESS PROFILE
NPI: 1093723322
VIRTUAL ACTIVE

Charles Thomas Grad, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Scranton, PA
Lewis Katz School of Medicine at Temple University (1972)
20+ Years Exp.
ACCESS PROFILE
NPI: 1093723231
VIRTUAL ACTIVE

Meriam Pacan Izon, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Fort Collins, CO
OFFICIAL REGISTRY DATA
20+ Years Exp.
ACCESS PROFILE
NPI: 1093722217
VIRTUAL ACTIVE

Matthew B. Walter, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Eugene, OR
University of Washington School of Medicine (1992)
20+ Years Exp.
ACCESS PROFILE
NPI: 1093721847
VIRTUAL ACTIVE

Laith Alsayegh, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Milwaukee, WI
Ohio State University College of Medicine (2002)
20+ Years Exp.
ACCESS PROFILE
NPI: 1093720591
VIRTUAL ACTIVE

Dana Lawrence Madison, MD, PHD

Internal Medicine

CREDENTIALS VERIFIED 2026
Portland, OR
UNIVERSITY OF CONNECTICUT SCHOOL OF MEDICINE (1998)
20+ Years Exp.
ACCESS PROFILE
NPI: 1093719528
VIRTUAL ACTIVE

Augustine Uchechukwu Obi, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Salisbury, NC
OFFICIAL REGISTRY DATA
21+ Years Exp.
ACCESS PROFILE
NPI: 1093719056
VIRTUAL ACTIVE

Michael Andrew Brown, M.D.

Internal Medicine

CREDENTIALS VERIFIED 2026
Walnut Creek, CA
Yale School of Medicine (1993)
21+ Years Exp.
ACCESS PROFILE
NPI: 1093719023
VIRTUAL ACTIVE

Alan Stuart Chanales, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Rockville, MD
Albert Einstein College of Medicine (1977)
21+ Years Exp.
ACCESS PROFILE
NPI: 1093719015
VIRTUAL ACTIVE

George S Chrysant, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Oklahoma City, OK
University of Oklahoma College of Medicine (1997)
21+ Years Exp.
ACCESS PROFILE
NPI: 1093718959
VIRTUAL ACTIVE

Patricia A.R. Alexander, MD

Internal Medicine

CREDENTIALS VERIFIED 2026
Titusville, FL
Rutgers New Jersey Medical School (2000)
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