John Scott Martin-Joy, M.D.
Psychiatry Physician · Cambridge, MA
John Scott Martin-Joy, M.D. is a psychiatry physician with a practice address in Cambridge, Massachusetts, and NPI 1023169141, issued on Jan 16, 2007. Check the license (Massachusetts 210262, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John Scott Martin-Joy
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 210262 MA
Self-reported in NPPES; status is on the state search - Practice location
- 875 Massachusetts Ave Ste 22, Cambridge, MA 02139
- Phone
- (617) 417-6902
- Enumerated
- Jan 16, 2007
- Record last updated
- Oct 29, 2025
- Fax
- (315) 821-8567
- Medicare enrollment
- Enrolled (PECOS I20040415001060); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Verify John Scott Martin-Joy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 210262Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average psychiatry physician in 2024
173 Medicare Part D claims for 18 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Escitalopram Oxalate16 claims
- Sertraline Hcl14 claims
- Clonazepam13 claims
- Fluvoxamine Maleate12 claims
- Mirtazapine12 claims
- Methylphenidate Er11 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.
One hospital affiliation
- Mount Auburn HospitalCambridge, MA · Acute Care Hospitals4 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
John Scott Martin-Joy among 2,736 psychiatry physician records in Massachusetts
John Scott Martin-Joy, M.D. is one of 2,736 psychiatry physician records with a practice address in Massachusetts. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 49% of them.
- NPI issued2007 · 49% of these records are older, 37% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated1998 · median 2005 among the 1,219 with a school on file
- Record last updated2025 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
213 psychiatry physician records list a practice address in Cambridge
They are 213 of the 5,145 NPPES records with a practice address in Cambridge, and 2,736 psychiatry physician records in Massachusetts.
All 2,736 in Massachusetts → Every provider in Cambridge → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Sanda Aung, MDCambridge, MA 021391679564108
- Sherry Bauman, MDCambridge, MA 021391023082708
- Wayne Brunell, MDCambridge, MA 021391740282094
- Astrid Desrosiers, MD MPHCambridge, MA 021391033109582
- Lili Gottfried, MDCambridge, MA 021391215902390
- Sanjay Gulati, MDCambridge, MA 021391316910094
- Joseph Jackson, D.O.Cambridge, MA 021391609847631
- Michael Leslie, M.D.Cambridge, MA 021391851367395
Common questions
What is John Scott Martin-Joy, M.D.'s NPI number?
John Scott Martin-Joy, M.D.'s National Provider Identifier (NPI) is 1023169141, issued on Jan 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Scott Martin-Joy, M.D. located?
The NPPES record lists a practice address at 875 Massachusetts Ave Ste 22, Cambridge, MA, 02139. Phone: (617) 417-6902. Providers update this record themselves, so call before visiting.
How can I verify John Scott Martin-Joy, M.D.'s license?
NPPES lists Massachusetts license number 210262, 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 John Scott Martin-Joy, M.D. prescribe under Medicare Part D?
In 2024, John Scott Martin-Joy, M.D. had 173 Medicare Part D claims for 18 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.