Joseph A. Diaz, MD
Internal Medicine Physician · Pawtucket, RI
Joseph A. Diaz, MD is an internal medicine physician with a practice address in Pawtucket, Rhode Island, and NPI 1356324248, issued on Nov 23, 2005. Check the license (Rhode Island MD10665, as entered in NPPES) on the Rhode Island Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- Joseph A. Diaz
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD10665 RI
Self-reported in NPPES; status is on the state search - Practice location
- 111 Brewster St, Pawtucket, RI 02860
- Phone
- (401) 729-3100
- Enumerated
- Nov 23, 2005
- Record last updated
- Apr 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (401) 729-2054
- Medicaid ID
- 9023606 RI
- Medicare enrollment
- Enrolled (PECOS I20041108000005); accepts Medicare assignment
- Medical or professional school
- Warren Alpert Medical School Of Brown University, 1996
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,033 in Rhode Island → Look up another NPI →
Also registered at 111 Brewster St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Denisse AbreuCommunity Health Worker1811643331
- Janet Ackman, PTPhysical Therapist1154488724
- Gowri Anandarajah, MDFamily Medicine Physician1558342311
- Tracey AndersonSpeech-Language Pathologist1780710863
- David Anthony, MDFamily Medicine Physician1508847377
- Lauren Aponte, PA-CPhysician Assistant1649942954
Verify Joseph A. Diaz 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 MD10665Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average internal medicine physician in 2024
825 Medicare Part D claims for 64 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Lisinopril64 claims
- Atorvastatin Calcium60 claims
- Omeprazole56 claims
- Amlodipine Besylate46 claims
- Gabapentin34 claims
- Metoprolol Succinate30 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: $27.11
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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
- Affinity Physicians LLC.Warwick, RI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph A. Diaz among 1,033 internal medicine physician records in Rhode Island
Joseph A. Diaz, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1996 · median 2006 among the 590 with a school on file
- Record last updated2021 · 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).
38 internal medicine physician records list a practice address in Pawtucket
They are 38 of the 1,284 NPPES records with a practice address in Pawtucket, and 1,033 internal medicine physician records in Rhode Island.
All 1,033 in Rhode Island → Every provider in Pawtucket → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ahmad Al-Raqqad, M.D.Pawtucket, RI 028601528020765
- Jerald Fingerut, MDPawtucket, RI 028601619975067
- Iulia Grillo, MDPawtucket, RI 028601609859479
- Christine Herbert, M.D.Pawtucket, RI 028601346202884
- Gregory Lazan, MDPawtucket, RI 028601538146097
- Fadi Mansourati, MDPawtucket, RI 028601548245962
- David Marcoux, M.D.Pawtucket, RI 028601730140864
- Felicia Meila, M.D.Pawtucket, RI 028601720049802
Common questions
What is Joseph A. Diaz, MD's NPI number?
Joseph A. Diaz, MD's National Provider Identifier (NPI) is 1356324248, issued on Nov 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Joseph A. Diaz, MD located?
The NPPES record lists a practice address at 111 Brewster St, Pawtucket, RI, 02860. Phone: (401) 729-3100. Providers update this record themselves, so call before visiting.
How can I verify Joseph A. Diaz, MD's license?
NPPES lists Rhode Island license number MD10665, 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 Joseph A. Diaz, MD prescribe under Medicare Part D?
In 2024, Joseph A. Diaz, MD had 825 Medicare Part D claims for 64 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.