HealthcareDiscovery.AI / Doctors / Maryland / Frederick / Internal Medicine

Internal Medicine in Frederick, Maryland

Data updated monthly · Last refresh September 2026

59 Internal Medicine providers practice in Frederick, and 39% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Internal Medicine providers in Frederick

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Sibte Kazmi, MD
Frederick, MD · $1,143 in drug and device payments (2025) · (301) 662-8310
Dr. Sidharthi Trichy Selvaraj, MD
Frederick, MD · $119 in drug and device payments (2025) · (240) 566-3300
Dr. Susan Brinkley, M.D.
Frederick, MD · No drug or device payments recorded (2025) · (301) 668-2800
Dr. Syed Haque, M.D.
Frederick, MD · $227 in drug and device payments (2025) · (301) 662-5252
Dr. Thomas Parambil, MD
Frederick, MD · No drug or device payments recorded (2025) · Telehealth · (240) 215-6310
Dr. Trinka Coster, M.D.
Frederick, MD · No drug or device payments recorded (2025) · (301) 319-7208
Dr. Usha Sivakumar, M.D.
Frederick, MD · $1,272 in drug and device payments (2025) · Telehealth · (301) 228-9123
Dr. William Byrne, M.D.
Frederick, MD · No drug or device payments recorded (2025) · (301) 620-0280
Dr. Yassin Mohamed, M.D.
Frederick, MD · No drug or device payments recorded (2025) · Telehealth · (301) 662-8119

Conditions Internal Medicine providers in Frederick, Maryland commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Internal Medicine providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Internal Medicine providers are in Frederick, Maryland?

There are 59 Internal Medicine providers with active NPI records practicing in Frederick, according to federal NPPES data refreshed monthly.

How many Internal Medicine providers in Frederick received drug or device company payments?

23 of 59 (39%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Internal Medicine providers in Frederick treat?

Internal Medicine providers in Frederick commonly treat high blood pressure, type 2 diabetes, high cholesterol, preventive care, chronic disease management and related conditions. Individual practices vary, so confirm with the provider before booking.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in Frederick Internal Medicine across Maryland

Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.