Robert Benjamin Diener, M.D.
Psychiatry Physician · Bridgewater, MA
Robert Benjamin Diener, M.D. is a psychiatry physician with a practice address in Bridgewater, Massachusetts, and NPI 1881884989, issued on Jul 26, 2007. Check the license (Massachusetts 73381, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Robert Benjamin Diener
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 73381 MA
Self-reported in NPPES; status is on the state search - Practice location
- Bridgewater State Hospital, Bridgewater, MA 02234
- Phone
- (508) 279-4500
- Enumerated
- Jul 26, 2007
- Record last updated
- Jul 26, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20151112001039); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1989
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Verify Robert Benjamin Diener in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 73381Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% more Medicare Part D claims than the average psychiatry physician in 2024
1,436 Medicare Part D claims for 94 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Benztropine Mesylate233 claims
- Haloperidol160 claims
- Olanzapine131 claims
- Quetiapine Fumarate84 claims
- Haloperidol Decanoate72 claims
- Clozapine69 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.
Industry payments in 2024: $13.26
1 payment: food and beverage; the largest payer was Indivior Inc. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Bay Cove Human Services, IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Benjamin Diener among 2,736 psychiatry physician records in Massachusetts
Robert Benjamin Diener, 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
- Graduated1989 · median 2005 among the 1,219 with a school on file
- Record last updated2007 · 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).
7 psychiatry physician records list a practice address in Bridgewater
They are 7 of the 364 NPPES records with a practice address in Bridgewater, and 2,736 psychiatry physician records in Massachusetts.
All 2,736 in Massachusetts → Every provider in Bridgewater → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Benjamin Brown, MDBoston, MA 022151265994263
- Kimberly Brummell, MDBoston, MA 022151477294536
- Jonathan Chevinsky, MDBoston, MA 022151588243000
- Stephen ConwayBoston, MA 022151609339761
- Sonya Freeman, MDBoston, MA 022151306466339
- Callie Ginapp, MDBoston, MA 022151669175840
- Nancy Lu, MDBoston, MA 022151780435289
- Anne Miller, MDBoston, MA 022151932765666
Common questions
What is Robert Benjamin Diener, M.D.'s NPI number?
Robert Benjamin Diener, M.D.'s National Provider Identifier (NPI) is 1881884989, issued on Jul 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Robert Benjamin Diener, M.D. located?
The NPPES record lists a practice address at Bridgewater State Hospital, Bridgewater, MA, 02234. Phone: (508) 279-4500. Providers update this record themselves, so call before visiting.
How can I verify Robert Benjamin Diener, M.D.'s license?
NPPES lists Massachusetts license number 73381, 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 Benjamin Diener, M.D. prescribe under Medicare Part D?
In 2024, Robert Benjamin Diener, M.D. had 1,436 Medicare Part D claims for 94 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.