Tim F. Greten, M.D.
Hematology & Oncology Physician · Bethesda, MD
Tim F. Greten, M.D. is a hematology & oncology physician with a practice address in Bethesda, Maryland, and NPI 1518231000, issued on Feb 29, 2012. Check the license (Maryland D0048405, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Tim F. Greten
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- D0048405 MD
Self-reported in NPPES; status is on the state search - Practice location
- Nci Building 10 RM 12N226, Bethesda, MD 20892
- Phone
- (301) 451-4723
- Enumerated
- Feb 29, 2012
- Record last updated
- Feb 29, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 317 in Maryland → Look up another NPI →
Verify Tim F. Greten in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0048405Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $2,342.70
6 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca UK Limited. The 8,560 providers of this specialty with any payment received $7,481.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Tim F. Greten among 317 hematology & oncology physician records in Maryland
Tim F. Greten, M.D. is one of 317 hematology & oncology physician records with a practice address in Maryland. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 74% of them.
- NPI issued2012 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2012 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Maryland
There are 317 hematology & oncology physician records in Maryland.
All 317 in Maryland → Every provider in Bethesda → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Philip Arlen, M.D.Bethesda, MD 208921093857047
- Sanjeeve Balasubramaniam, MDBethesda, MD 208921700099710
- Alice Chen, MDBethesda, MD 208921518079805
- Ezekiel Jonathan Emanuel, M.D.Bethesda, MD 208921447375381
- Giuseppe GiacconeBethesda, MD 208921417193376
- James Gulley, MD PHD FACPBethesda, MD 208921720038771
- Charles Hesdorffer, MDBethesda, MD 208921356302095
- Matthew Hsieh, MDBethesda, MD 208921992915458
Common questions
What is Tim F. Greten, M.D.'s NPI number?
Tim F. Greten, M.D.'s National Provider Identifier (NPI) is 1518231000, issued on Feb 29, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Tim F. Greten, M.D. located?
The NPPES record lists a practice address at Nci Building 10 RM 12N226, Bethesda, MD, 20892. Phone: (301) 451-4723. Providers update this record themselves, so call before visiting.
How can I verify Tim F. Greten, M.D.'s license?
NPPES lists Maryland license number D0048405, as entered by the provider. 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. Medicare files from data.cms.gov. 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.