Peter M. Grinspoon, M.D.
Internal Medicine Physician · Chelsea, MA
Peter M. Grinspoon, M.D. is an internal medicine physician with a practice address in Chelsea, Massachusetts, and NPI 1952560310, issued on Jun 2, 2008. Check the license (Massachusetts P-204412, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Peter M. Grinspoon
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- P-204412 MA
Self-reported in NPPES; status is on the state search - Practice location
- 151 Everett Avenue, Chelsea, MA 02150
- Phone
- (617) 884-8300
- Enumerated
- Jun 2, 2008
- Record last updated
- Feb 14, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (617) 887-4646
- Medicare enrollment
- Enrolled (PECOS I20041123000390); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 151 Everett Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexy Arauz Boudreau, MDPediatrics Physician1467433128
- Sara Auld, M.D.Pulmonary Disease Physician1376734491
- Lisa Carr, MDPediatrics Physician1336259480
- Marya Cohen, MDInternal Medicine Physician1669508040
- Colleen Ford, M.D.Internal Medicine Physician1821317959
- Gail Gall, APRN, BCAdult Health Nurse Practitioner1063564599
Verify Peter M. Grinspoon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license P-204412Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,390 Medicare Part D claims for 157 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 52 claims were for opioids.
Most prescribed
- Atorvastatin Calcium136 claims
- Lisinopril75 claims
- Metformin Hcl61 claims
- Losartan Potassium58 claims
- Omeprazole53 claims
- Metoprolol Succinate49 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
- The General Hospital CorporationChelsea, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter M. Grinspoon among 6,825 internal medicine physician records in Massachusetts
Peter M. Grinspoon, M.D. 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 2008, is newer than 55% of them.
- NPI issued2008 · 55% of these records are older, 40% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1997 · median 2004 among the 4,103 with a school on file
- Record last updated2014 · 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).
36 internal medicine physician records list a practice address in Chelsea
They are 36 of the 998 NPPES records with a practice address in Chelsea, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Chelsea → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sefik Abdulhayoglu, MDChelsea, MA 021501659358166
- Jose Abrego, MDChelsea, MA 021501205808722
- Nancy Adams, M.D.Chelsea, MA 021501649236365
- Wynne Armand, MDChelsea, MA 021501497745939
- Judith Fisch, MDChelsea, MA 021501487644126
- Herman Gomez, MDChelsea, MA 021501639153414
- Ann Kao, MDChelsea, MA 021501588643282
- Cindy Levine, M.D.Chelsea, MA 021501437137270
Common questions
What is Peter M. Grinspoon, M.D.'s NPI number?
Peter M. Grinspoon, M.D.'s National Provider Identifier (NPI) is 1952560310, issued on Jun 2, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Peter M. Grinspoon, M.D. located?
The NPPES record lists a practice address at 151 Everett Avenue, Chelsea, MA, 02150. Phone: (617) 884-8300. Providers update this record themselves, so call before visiting.
How can I verify Peter M. Grinspoon, M.D.'s license?
NPPES lists Massachusetts license number P-204412, 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 Peter M. Grinspoon, M.D. prescribe under Medicare Part D?
In 2024, Peter M. Grinspoon, M.D. had 1,390 Medicare Part D claims for 157 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.