William Francis Dunn, D.O.
Internal Medicine Physician · Southbridge, MA
William Francis Dunn, D.O. is an internal medicine physician with a practice address in Southbridge, Massachusetts, and NPI 1043246978, issued on Jun 23, 2006. Check the license (Massachusetts 73792, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William Francis Dunn
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 73792 MA
Self-reported in NPPES; status is on the state search - Practice location
- 100 South St, Southbridge, MA 01550
- Phone
- (508) 764-2620
- Enumerated
- Jun 23, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (508) 765-1807
- Medicaid ID
- 3075494 MA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 100 South St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dianne Aguirre, PAPhysician Assistant1659874121
- Joseph Amegah, M SMental Health Counselor1972625358
- Cheryl Amodeo, RNCase Management Registered Nurse1821134172
- Alan Anderson, C.R.N.A.Certified Registered Nurse Anesthetist1891713160
- Mary Banda, MDInternal Medicine Physician1265481311
- Janet Baum, M.D.Diagnostic Radiology Physician1053392944
Verify William Francis Dunn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 73792Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
186 Medicare Part D claims for 100 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Atorvastatin Calcium15 claims
- Amlodipine Besylate13 claims
- Losartan Potassium12 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.
The MIPS final score for 2023 (Medicare payment program): 97 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
William Francis Dunn among 6,825 internal medicine physician records in Massachusetts
William Francis Dunn, D.O. is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% 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, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2007 · 64% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 internal medicine physician records list a practice address in Southbridge
They are 14 of the 546 NPPES records with a practice address in Southbridge, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Southbridge → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mary Banda, MDSouthbridge, MA 015501265481311
- Nizam DinSouthbridge, MA 015501861659625
- Patrick Duplan, MDSouthbridge, MA 015501124656285
- Vladas Litani, MDSouthbridge, MA 015501528072360
- Suresh Mamidala, M.DSouthbridge, MA 015501437394350
- Issam Oneyssi, M.D.Southbridge, MA 015501528026622
- Adam Paszkowski, M.D.Southbridge, MA 015501306872452
- Francis Powers, M.D.Southbridge, MA 015501811905516
Common questions
What is William Francis Dunn, D.O.'s NPI number?
William Francis Dunn, D.O.'s National Provider Identifier (NPI) is 1043246978, issued on Jun 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Francis Dunn, D.O. located?
The NPPES record lists a practice address at 100 South St, Southbridge, MA, 01550. Phone: (508) 764-2620. Providers update this record themselves, so call before visiting.
How can I verify William Francis Dunn, D.O.'s license?
NPPES lists Massachusetts license number 73792, 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 William Francis Dunn, D.O. prescribe under Medicare Part D?
In 2024, William Francis Dunn, D.O. had 186 Medicare Part D claims for 100 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is William Francis Dunn, D.O.'s MIPS final score?
The 2023 MIPS final score is 97 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.