Robert Jonathan Fenster, M.D.-PH.D.
Psychiatry Physician · Belmont, MA
Robert Jonathan Fenster, M.D.-PH.D. is a psychiatry physician with a practice address in Belmont, Massachusetts, and NPI 1801141973, issued on Jul 16, 2012. Check the license (Massachusetts 270775, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Robert Jonathan Fenster
- Credential
- M.D.-PH.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- 270775 MA
MD60652939 WA
Self-reported in NPPES; status is on the state search - Practice location
- 115 Mill St, Belmont, MA 02478
- Phone
- (617) 855-4221
- Enumerated
- Jul 16, 2012
- Record last updated
- Jul 21, 2022
- Medicaid ID
- 1801141973 WA
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Also registered at 115 Mill St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Blaise Aguirre, MDChild & Adolescent Psychiatry Physician1619936846
- Kayia Akoun, M.D.Psychiatry Physician1588028732
- Rana Alam-RomanosSocial Worker1487420311
- Robert Alexander, M.D.Psychiatry Physician1447526074
- Madeleine AllenStudent in an Organized Health Care Education/Training Program1205553971
- Danielle Alleven, PSY.D.Clinical Psychologist1891741153
Verify Robert Jonathan Fenster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 270775Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average psychiatry physician in 2024
64 Medicare Part D claims, against an average of 1,000 among the 35,054 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.
Robert Jonathan Fenster among 2,736 psychiatry physician records in Massachusetts
Robert Jonathan Fenster, M.D.-PH.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 2012, is newer than 72% of them.
- NPI issued2012 · 72% of these records are older, 26% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · 45% of these records are
- Record last updated2022 · 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).
151 psychiatry physician records list a practice address in Belmont
They are 151 of the 1,008 NPPES records with a practice address in Belmont, and 2,736 psychiatry physician records in Massachusetts.
All 2,736 in Massachusetts → Every provider in Belmont → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Joseph Albeck, MDBelmont, MA 024781255313375
- Ross Baldessarini, MDBelmont, MA 024781487644787
- Leora Borek, M.D.Belmont, MA 024781134115553
- Craig Boyajian, M.D.Belmont, MA 024781831188200
- Marni Chanoff, MDBelmont, MA 024781013908706
- Donald Cluett, M.D.Belmont, MA 024781710969381
- Leonard Glass, MDBelmont, MA 024781639159627
- April Hirschberg, MDBelmont, MA 024781063403681
Common questions
What is Robert Jonathan Fenster, M.D.-PH.D.'s NPI number?
Robert Jonathan Fenster, M.D.-PH.D.'s National Provider Identifier (NPI) is 1801141973, issued on Jul 16, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Robert Jonathan Fenster, M.D.-PH.D. located?
The NPPES record lists a practice address at 115 Mill St, Belmont, MA, 02478. Phone: (617) 855-4221. Providers update this record themselves, so call before visiting.
How can I verify Robert Jonathan Fenster, M.D.-PH.D.'s license?
NPPES lists Massachusetts license number 270775, 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 Robert Jonathan Fenster, M.D.-PH.D. prescribe under Medicare Part D?
In 2024, Robert Jonathan Fenster, M.D.-PH.D. had 64 Medicare Part D claims; 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.