Robert Michael Greenfield, MD
Internal Medicine Physician · Annapolis, MD
Robert Michael Greenfield, MD is an internal medicine physician with a practice address in Annapolis, Maryland, and NPI 1821005984, issued on Aug 2, 2006. Check the license (Maryland D0026373, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Robert Michael Greenfield
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D0026373 MD
Self-reported in NPPES; status is on the state search - Practice location
- 139 Old Solomons Island RD, Annapolis, MD 21401
- Phone
- (410) 224-2222
- Enumerated
- Aug 2, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (410) 224-4926
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 139 Old Solomons Island RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Angela Pierce, CRNP-FAMILYFamily Nurse Practitioner1467822270
Verify Robert Michael Greenfield in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0026373Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
11 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $20.05
1 payment: food and beverage; the largest payer was Hydrofera LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Robert Michael Greenfield among 3,904 internal medicine physician records in Maryland
Robert Michael Greenfield, MD is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 55% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
100 internal medicine physician records list a practice address in Annapolis
They are 100 of the 3,629 NPPES records with a practice address in Annapolis, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Annapolis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Titus Abraham, MDAnnapolis, MD 214011598764540
- Donna Chambers, MDAnnapolis, MD 214011528067642
- Aditya Chopra, MDAnnapolis, MD 214011508850991
- Michael Freedman, M.D.Annapolis, MD 214011528045606
- Joseph Friend, MDAnnapolis, MD 214011144207028
- Howard Goldstein, MDAnnapolis, MD 214011174500060
- Brian Harvey, MDAnnapolis, MD 214011285636217
- Okeowo Ibitoye, MDAnnapolis, MD 214011154322352
Common questions
What is Robert Michael Greenfield, MD's NPI number?
Robert Michael Greenfield, MD's National Provider Identifier (NPI) is 1821005984, issued on Aug 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Michael Greenfield, MD located?
The NPPES record lists a practice address at 139 Old Solomons Island RD, Annapolis, MD, 21401. Phone: (410) 224-2222. Providers update this record themselves, so call before visiting.
How can I verify Robert Michael Greenfield, MD's license?
NPPES lists Maryland license number D0026373, 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.
How much does Robert Michael Greenfield, MD prescribe under Medicare Part D?
In 2024, Robert Michael Greenfield, MD had 11 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.