Peter L. Willis, M.D.
Family Medicine Physician · Westerly, RI
Peter L. Willis, M.D. is a family medicine physician with a practice address in Westerly, Rhode Island, and NPI 1730144551, issued on Apr 18, 2006. Check the license (Rhode Island MD10903, as entered in NPPES) on the Rhode Island Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- Peter L. Willis
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD10903 RI
Self-reported in NPPES; status is on the state search - Practice location
- 25 Wells St, Westerly, RI 02891
- Phone
- (401) 596-8990
- Enumerated
- Apr 18, 2006
- Record last updated
- Feb 18, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (401) 865-2393
- Medicare enrollment
- Enrolled (PECOS I20040513000081); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 475 in Rhode Island → Look up another NPI →
Also registered at 25 Wells St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica AimoneRegistered Dietitian1659469088
- Matthew Amaral, PHARMD., RPHPharmacist1750948667
- Jeanne Ansel, PAPhysician Assistant1124067178
- Bridget Azera, MDHospitalist Physician1861997272
- Bart Bachura, CRNACertified Registered Nurse Anesthetist1568846301
- Julie Barber, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1144887118
Verify Peter L. Willis 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 MD10903Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average family medicine physician in 2024
467 Medicare Part D claims for 340 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 50 claims were for opioids.
Most prescribed
- Cephalexin50 claims
- Doxycycline Hyclate43 claims
- Methylprednisolone43 claims
- Oxycodone-Acetaminophen34 claims
- Amoxicillin-Clavulanate Potass20 claims
- Prednisone18 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.
Bills Medicare through 2 group practices
- Lawrence And Memorial Hospital Inc.New London, CT
- Lmw Healthcare IncWesterly, RI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter L. Willis among 475 family medicine physician records in Rhode Island
Peter L. Willis, M.D. is one of 475 family medicine physician records with a practice address in Rhode Island. 76% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 60% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1996 · median 2008 among the 282 with a school on file
- Record last updated2020 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Rhode Island practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 family medicine physician records list a practice address in Westerly
They are 8 of the 416 NPPES records with a practice address in Westerly, and 475 family medicine physician records in Rhode Island.
All 475 in Rhode Island → Every provider in Westerly → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Rocco Andreozzi, DOWesterly, RI 028911386608164
- Bartel Crisafi, MDWesterly, RI 028911124079090
- Walter Curtice, M.D.Westerly, RI 028911952565889
- Joseph Giancaspro, MDWesterly, RI 028911578577037
- Marianne Longacre, DOWesterly, RI 028911396776266
- Bernard Marzilli, Jr., D.O.Westerly, RI 028911396825931
- Mina Gamal Nasr Wilson, MDWesterly, RI 028911831612035
- Jennifer Buckley, MDWest Warwick, RI 028931811125081
Common questions
What is Peter L. Willis, M.D.'s NPI number?
Peter L. Willis, M.D.'s National Provider Identifier (NPI) is 1730144551, issued on Apr 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Peter L. Willis, M.D. located?
The NPPES record lists a practice address at 25 Wells St, Westerly, RI, 02891. Phone: (401) 596-8990. Providers update this record themselves, so call before visiting.
How can I verify Peter L. Willis, M.D.'s license?
NPPES lists Rhode Island license number MD10903, 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 Peter L. Willis, M.D. prescribe under Medicare Part D?
In 2024, Peter L. Willis, M.D. had 467 Medicare Part D claims for 340 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.