Keith William Brennan, M.D.
Internal Medicine Physician · Providence, RI
Keith William Brennan, M.D. is an internal medicine physician with a practice address in Providence, Rhode Island, and NPI 1659668580, issued on Jun 29, 2011. Check the license (Rhode Island LP02331, as entered in NPPES) on the Rhode Island Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- Keith William Brennan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- LP02331 RI
Self-reported in NPPES; status is on the state search - Practice location
- 825 Chalkstone Ave, Providence, RI 02908
- Phone
- (401) 456-2145
- Enumerated
- Jun 29, 2011
- Record last updated
- Jun 29, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (401) 456-6809
- Medicare enrollment
- Enrolled (PECOS I20150810000489); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,033 in Rhode Island → Look up another NPI →
Also registered at 825 Chalkstone Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Keith William 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 LP02331Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
156 Medicare Part D claims for 88 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 16 claims were for opioids.
Most prescribed
- Cefpodoxime Proxetil12 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: $1,427.24
6 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. 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.
Bills Medicare through one group practice
- Mount Sinai School OF MedicineOceanside, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Keith William Brennan among 1,033 internal medicine physician records in Rhode Island
Keith William Brennan, M.D. 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 2011, is newer than 51% of them.
- NPI issued2011 · 51% of these records are older, 47% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2011 · median 2006 among the 590 with a school on file
- Record last updated2011 · 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).
511 internal medicine physician records list a practice address in Providence
They are 511 of the 9,647 NPPES records with a practice address in Providence, and 1,033 internal medicine physician records in Rhode Island.
All 1,033 in Rhode Island → Every provider in Providence → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jeffrey Austerlitz, M.D.Providence, RI 029081356363527
- Dawna Blake, M.D.Providence, RI 029081548285489
- Gwyneth Granton, MDProvidence, RI 029081336132935
- Guang Hu, M.D.Providence, RI 029081598783524
- Laura Magan, MDProvidence, RI 029081962441543
- Thomas O'Toole, M.D.Providence, RI 029081790705739
- Lorna RussellProvidence, RI 029081134140866
- Parviz Shavandy, M.D.Providence, RI 029081841247889
Common questions
What is Keith William Brennan, M.D.'s NPI number?
Keith William Brennan, M.D.'s National Provider Identifier (NPI) is 1659668580, issued on Jun 29, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Keith William Brennan, M.D. located?
The NPPES record lists a practice address at 825 Chalkstone Ave, Providence, RI, 02908. Phone: (401) 456-2145. Providers update this record themselves, so call before visiting.
How can I verify Keith William Brennan, M.D.'s license?
NPPES lists Rhode Island license number LP02331, 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 Keith William Brennan, M.D. prescribe under Medicare Part D?
In 2024, Keith William Brennan, M.D. had 156 Medicare Part D claims for 88 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.