John J. Flanagan, M.D.
Emergency Medicine Physician · Southbridge, MA
John J. Flanagan, M.D. is an emergency medicine physician with a practice address in Southbridge, Massachusetts, and NPI 1487814737, issued on Jun 11, 2008. Check the license (Massachusetts 236541, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John J. Flanagan
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 236541 MA
18108 NH
Self-reported in NPPES; status is on the state search - Practice location
- 100 South St, Southbridge, MA 01550
- Phone
- (508) 765-9771
- Enumerated
- Jun 11, 2008
- Record last updated
- Apr 3, 2023
- Fax
- (508) 764-2448
- Medicare enrollment
- Enrolled (PECOS I20170512001292); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 2008
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 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 John J. Flanagan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 236541Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average emergency medicine physician in 2024
135 Medicare Part D claims for 91 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 19 claims were for opioids.
Most prescribed
- Cephalexin15 claims
- Hydrocodone-Acetaminophen15 claims
- Prednisone14 claims
- Azithromycin13 claims
- Ibuprofen13 claims
- Amoxicillin-Clavulanate Potass11 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 one group practice
- New Hampshire Emergency Physician Associates PCWolfeboro, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John J. Flanagan among 1,829 emergency medicine physician records in Massachusetts
John J. Flanagan, M.D. is one of 1,829 emergency medicine physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 49% of them.
- NPI issued2008 · 49% of these records are older, 47% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2008 · median 2011 among the 1,200 with a school on file
- Record last updated2023 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
18 emergency medicine physician records list a practice address in Southbridge
They are 18 of the 546 NPPES records with a practice address in Southbridge, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Southbridge → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Kathleen Coan, MDSouthbridge, MA 015501255622304
- Kathleen Finn, D.O.Southbridge, MA 015501225029895
- Michael Gaudet, M.D.Southbridge, MA 015501972568061
- Michael Gray, MDSouthbridge, MA 015501316033871
- Christian Heinis, MDSouthbridge, MA 015501447226535
- Giza High, MDSouthbridge, MA 015501811157167
- Vincent Kan, MDSouthbridge, MA 015501306264395
- Andrew Marino, M.D.Southbridge, MA 015501164682423
Common questions
What is John J. Flanagan, M.D.'s NPI number?
John J. Flanagan, M.D.'s National Provider Identifier (NPI) is 1487814737, issued on Jun 11, 2008. An NPI identifies a provider in billing; it is not a license.
Where is John J. Flanagan, M.D. located?
The NPPES record lists a practice address at 100 South St, Southbridge, MA, 01550. Phone: (508) 765-9771. Providers update this record themselves, so call before visiting.
How can I verify John J. Flanagan, M.D.'s license?
NPPES lists Massachusetts license number 236541, 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 John J. Flanagan, M.D. prescribe under Medicare Part D?
In 2024, John J. Flanagan, M.D. had 135 Medicare Part D claims for 91 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.