Mary McMaster, M.D.
Medical Oncology Physician · Bethesda, MD
Mary McMaster, M.D. is a medical oncology physician with a practice address in Bethesda, Maryland, and NPI 1407214281, issued on Feb 8, 2016. Check the license on the Maryland Board of Physicians; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mary McMaster
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- 61455 NC
Self-reported in NPPES; status is on the state search - Practice location
- 9609 Medical Center Dr, Bethesda, MD 20892
- Phone
- (240) 276-7248
- Enumerated
- Feb 8, 2016
- Record last updated
- Feb 8, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 224 in Maryland → Look up another NPI →
Also registered at 9609 Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Helen Chen, M.D.Medical Oncology Physician1528512878
- Richard Little, MDHematology & Oncology Physician1972969038
- Malcolm Smith, M.D., PH.D.Pediatric Hematology & Oncology Physician1932579927
- James Zwiebel, M.D.Hematology & Oncology Physician1366868622
Verify Mary McMaster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of PhysiciansCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mary McMaster among 224 medical oncology physician records in Maryland
Mary McMaster, M.D. is one of 224 medical oncology physician records with a practice address in Maryland. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2016, is newer than 86% of them.
- NPI issued2016 · 86% of these records are older, 11% newer
- In a Medicare fileNo · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2016 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Maryland
There are 224 medical oncology physician records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 224 in Maryland → Every provider in Bethesda → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Christina Annunziata, M.D., PH.D.Bethesda, MD 208921093084139
- James Doroshow, M.D.Bethesda, MD 208921255456174
- Barbara Dunn, MDBethesda, MD 208921639424880
- Joseph Frank, M.D.Bethseda, MD 208921982974051
- Christian Hinrichs, M.D.Bethesda, MD 208921609002708
- Richard Hodes, M.D.Bethesda, MD 208921659369387
- Geoffrey Kim, M.D.Bethesda, MD 208921285831446
- Christopher Klebanoff, M.D.Bethesda, MD 208921023155827
Common questions
What is Mary McMaster, M.D.'s NPI number?
Mary McMaster, M.D.'s National Provider Identifier (NPI) is 1407214281, issued on Feb 8, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Mary McMaster, M.D. located?
The NPPES record lists a practice address at 9609 Medical Center Dr, Bethesda, MD, 20892. Phone: (240) 276-7248. Providers update this record themselves, so call before visiting.
How can I verify Mary McMaster, M.D.'s license?
Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.