Gregory Peter Westcott, M.D.
Endocrinology, Diabetes & Metabolism Physician · Boston, MA
Gregory Peter Westcott, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Boston, Massachusetts, and NPI 1548672116, issued on May 29, 2014. Check the license (Massachusetts 270034, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Gregory Peter Westcott
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 270034 MA
Self-reported in NPPES; status is on the state search - Practice location
- 110 Francis St, Boston, MA 02215
- Phone
- (617) 667-9344
- Enumerated
- May 29, 2014
- Record last updated
- May 20, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200608002829); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 522 in Massachusetts → Look up another NPI →
Also registered at 110 Francis St
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Verify Gregory Peter Westcott in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 270034Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
376 Medicare Part D claims for 58 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 63% of claims.
Most prescribed
- Ozempic46 claims
- Metformin Hcl33 claims
- Lantus Solostar29 claims
- Nano 2nd Gen Pen Needle29 claims
- Trulicity29 claims
- Jardiance25 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
- Harvard Medical Faculty Phys AT Beth Israel Deaconess Med Ctr IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Peter Westcott among 522 endocrinology, diabetes & metabolism physician records in Massachusetts
Gregory Peter Westcott, M.D. is one of 522 endocrinology, diabetes & metabolism physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 80% of them.
- NPI issued2014 · 80% of these records are older, 18% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2014 · median 2002 among the 378 with a school on file
- Record last updated2020 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Massachusetts
There are 522 endocrinology, diabetes & metabolism physician records in Massachusetts.
All 522 in Massachusetts → Every provider in Boston → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Richard Beaser, MDBoston, MA 022151447204540
- Ramachandiran Cooppan, M.D.Boston, MA 022151366499097
- Aaron Cypess, M.D., PH.D.Boston, MA 022151598730749
- Rachael Fawcett, M.D.Boston, MA 022151801879945
- Robert Gabbay, M.D.Boston, MA 022151720036627
- Jason Gaglia, M.D.Boston, MA 022151023098605
- Mark Herman, M.D.Boston, MA 022151043261795
- George King, M.D.Boston, MA 022151669458816
Common questions
What is Gregory Peter Westcott, M.D.'s NPI number?
Gregory Peter Westcott, M.D.'s National Provider Identifier (NPI) is 1548672116, issued on May 29, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Peter Westcott, M.D. located?
The NPPES record lists a practice address at 110 Francis St, Boston, MA, 02215. Phone: (617) 667-9344. Providers update this record themselves, so call before visiting.
How can I verify Gregory Peter Westcott, M.D.'s license?
NPPES lists Massachusetts license number 270034, 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 Gregory Peter Westcott, M.D. prescribe under Medicare Part D?
In 2024, Gregory Peter Westcott, M.D. had 376 Medicare Part D claims for 58 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.