Physician Profile
Margretta Diemer, M.D.
Unclaimed ProfileAbout Dr. Diemer
Margretta Diemer, M.D. is a healthcare provider in Bethesda, MD specializing in internal medicine. Margretta trained at Georgetown University School of Medicine, graduating in 1979.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (301) 319-4326
- Email not available
Practice Locations
WRNMMC, PCMH, BLDG 19 8901 WISCONSIN AVE
Bethesda, MD 20889
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internists in Bethesda 8
Same specialty, same city.
Trained at Georgetown University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1979 at Georgetown University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Margretta Diemer specialize in?
Margretta Diemer is an internist in Bethesda, MD. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where is Margretta Diemer located?
Margretta Diemer is listed at Wrnmmc, Pcmh, Bldg 19 8901 Wisconsin Ave, Bethesda, MD 20889. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Margretta Diemer's phone number?
The number on file is (301) 319-4326. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Margretta Diemer's NPI number?
Margretta Diemer's National Provider Identifier is 1669543252. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Margretta Diemer train?
Margretta Diemer attended Georgetown University School of Medicine, graduating in 1979. This comes from the CMS National Downloadable File.
CMS public data
How long has Margretta Diemer been practicing?
Margretta Diemer has 47 years experience. Calculated from a graduation year of 1979, reported in the CMS National Downloadable File.
CMS public data
Has Margretta Diemer confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Margretta Diemer. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.