Herbert J. Brennan, DO
Internal Medicine Physician · East Greenwich, RI
Herbert J. Brennan, DO is an internal medicine physician with a practice address in East Greenwich, Rhode Island, and NPI 1659489060, issued on Aug 26, 2006. Check the license (Rhode Island D000445, as entered in NPPES) on the Rhode Island Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- Herbert J. Brennan
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D000445 RI
Self-reported in NPPES; status is on the state search - Practice location
- 2358 South County Trail, East Greenwich, RI 02818
- Phone
- (401) 886-6000
- Enumerated
- Aug 26, 2006
- Record last updated
- Sep 10, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (401) 886-6002
- Medicare enrollment
- Enrolled (PECOS I20031124000631); may accept Medicare assignment
- Medical or professional school
- Chicago College Of Osteopathy, 1992
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,033 in Rhode Island → Look up another NPI →
Also registered at 2358 South County Trail
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charles Cronin, DOInternal Medicine Physician1740383389
Verify Herbert J. Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersRhode Island Board of Medical Licensure and Discipline
Search for license D000445Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average internal medicine physician in 2024
7,482 Medicare Part D claims for 525 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 234 claims were for opioids.
Most prescribed
- Atorvastatin Calcium332 claims
- Simvastatin327 claims
- Lisinopril288 claims
- Levothyroxine Sodium285 claims
- Omeprazole274 claims
- Amlodipine Besylate270 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: $154.89
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Herbert J. Brennan among 1,033 internal medicine physician records in Rhode Island
Herbert J. Brennan, DO is one of 1,033 internal medicine physician records with a practice address in Rhode Island. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 62% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1992 · median 2006 among the 590 with a school on file
- Record last updated2008 · 48% 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 Rhode Island practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 internal medicine physician records list a practice address in East Greenwich
They are 25 of the 599 NPPES records with a practice address in East Greenwich, and 1,033 internal medicine physician records in Rhode Island.
All 1,033 in Rhode Island → Every provider in East Greenwich → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Candow, MDEast Greenwich, RI 028181457365363
- Dana Chofay, MDEast Greenwich, RI 028181811943525
- Frank D'Alessandro, MD INCEast Greenwich, RI 028181225018955
- Richard Delsesto, MDEast Greenwich, RI 028181942318357
- David Fried, MDEast Greenwich, RI 028181275520678
- Denise Glickman, MDEast Greenwich, RI 028181033158647
- Richard Leach, DOEast Greenwich, RI 028181407852155
- James Mancini, MDEast Greenwich, RI 028181720006109
Common questions
What is Herbert J. Brennan, DO's NPI number?
Herbert J. Brennan, DO's National Provider Identifier (NPI) is 1659489060, issued on Aug 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Herbert J. Brennan, DO located?
The NPPES record lists a practice address at 2358 South County Trail, East Greenwich, RI, 02818. Phone: (401) 886-6000. Providers update this record themselves, so call before visiting.
How can I verify Herbert J. Brennan, DO's license?
NPPES lists Rhode Island license number D000445, as entered by the provider. Search the Rhode Island Board of Medical Licensure and Discipline at https://healthri.mylicense.com/Verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Herbert J. Brennan, DO prescribe under Medicare Part D?
In 2024, Herbert J. Brennan, DO had 7,482 Medicare Part D claims for 525 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.