Michael G. Gregory, MD
Internal Medicine Physician · Brookline, MA
Michael G. Gregory, MD is an internal medicine physician with a practice address in Brookline, Massachusetts, and NPI 1265457675, issued on Jul 13, 2006. Check the license (Massachusetts MA208255, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Michael G. Gregory
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MA208255 MA
Self-reported in NPPES; status is on the state search - Practice location
- 135 Pleasant St, Brookline, MA 02446
- Phone
- (617) 731-8131
- Enumerated
- Jul 13, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050630000109); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Verify Michael G. Gregory in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license MA208255Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
240 Medicare Part D claims for 29 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
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.
Bills Medicare through one group practice
- Massachusetts General Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael G. Gregory among 6,825 internal medicine physician records in Massachusetts
Michael G. Gregory, MD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 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 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1987 · median 2004 among the 4,103 with a school on file
- Record last updated2007 · 64% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
57 internal medicine physician records list a practice address in Brookline
They are 57 of the 2,357 NPPES records with a practice address in Brookline, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Brookline → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Paul Blando, M.D.Brookline, MA 024461063451862
- Richard Brodie, M.D.Brookline, MA 024461912900473
- Jayson Carr, M.D.Brookline, MA 024461780611798
- William Goldberg, M.D.Brookline, MA 024461558336180
- Parnag Kasarjian, M.D.Brookline, MA 024461114966207
- Cyrus Komer, MDBrookline, MA 024461184602302
- R Roger Komer, M.D.Brookline, MA 024461235178237
- Hua Lu, MD PHDBrookline, MA 024461043288749
Common questions
What is Michael G. Gregory, MD's NPI number?
Michael G. Gregory, MD's National Provider Identifier (NPI) is 1265457675, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael G. Gregory, MD located?
The NPPES record lists a practice address at 135 Pleasant St, Brookline, MA, 02446. Phone: (617) 731-8131. Providers update this record themselves, so call before visiting.
How can I verify Michael G. Gregory, MD's license?
NPPES lists Massachusetts license number MA208255, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael G. Gregory, MD prescribe under Medicare Part D?
In 2024, Michael G. Gregory, MD had 240 Medicare Part D claims for 29 beneficiaries; 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.