Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Margretta Diemer, MD

Individual provider Internal Medicine Physician · NPI 1669543252

Margretta Diemer, MD is an Interventional Pain Management in Bethesda, Maryland. Graduated from Georgetown University School of Medicine in 1979, 47 years ago. Practices with Suburban/NRH Medical Rehabilitation Inc, a 913-clinician group and accepts Medicare assignment. Licensed in Virginia.

Years since qualifying
47
Trained at
Georgetown University School of Medicine
Licensed in
VA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

Wrnmmc Pcmh Bldg 19 8901 Wisconsin Ave
Bethesda, MD 20889-0001
Phone: (301) 319-4326
Fax: (301) 400-0618
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 0101034873 (VA)

Record details

NPI number1669543252
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 13, 2006
Last updated in NPPESNovember 16, 2023
Certification dateNovember 16, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERVENTIONAL PAIN MANAGEMENT
Also practisesGERIATRIC MEDICINE
Medical schoolGEORGETOWN UNIVERSITY SCHOOL OF MEDICINE
Graduated 1979 (47 years in practice)
Group practice Suburban/Nrh Medical Rehabilitation Inc — 913 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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