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Blood Banking & Transfusion Medicine in Bethesda, Maryland

Data updated monthly · Last refresh September 2026

9 Blood Banking & Transfusion Medicine providers practice in Bethesda. Listings are drawn from federal public records and are not endorsements.

Blood Banking & Transfusion Medicine providers in Bethesda

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. Clayton Simon, MD
Bethesda, MD · No drug or device payments recorded (2025) · (301) 295-4000
Dr. Harvey Alter, MD
Bethesda, MD · No drug or device payments recorded (2025) · (301) 496-8393
Dr. Ion Chiosea, M.D.
Bethesda, MD · No drug or device payments recorded (2025) · (301) 451-8612
Dr. James Long, M.D.
Bethesda, MD · $116 in drug and device payments (2025) · (301) 295-4000
Dr. Kathleen Conry-cantilena, M.D.
Bethesda, MD · No drug or device payments recorded (2025) · (301) 496-4506
Dr. Leonard Chen, M.D.
Bethesda, MD · No drug or device payments recorded (2025) · (301) 451-8186
Dr. Roya Zarpak, MD, MS
Bethesda, MD · No drug or device payments recorded (2025) · (000) 000-0000
Dr. Viviana Johnson
Bethesda, MD · No drug or device payments recorded (2025) · (301) 319-4073
Dr. Willy Flegel, MD
Bethesda, MD · No drug or device payments recorded (2025) · (301) 594-7401

Common questions

How many Blood Banking & Transfusion Medicine providers are in Bethesda, Maryland?

There are 9 Blood Banking & Transfusion Medicine providers with active NPI records practicing in Bethesda, according to federal NPPES data refreshed monthly.

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 Bethesda Blood Banking & Transfusion Medicine across Maryland

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
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.