Michael S. Kelfer, MD
Gastroenterology Physician · Auburn, MA
Michael S. Kelfer, MD is a gastroenterology physician with a practice address in Auburn, Massachusetts, and NPI 1306810296, issued on Feb 15, 2006. Check the license (Massachusetts 70572, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Michael S. Kelfer
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 70572 MA
Self-reported in NPPES; status is on the state search - Practice location
- 385 Southbridge St, Auburn, MA 01501
- Phone
- (508) 425-5446
- Enumerated
- Feb 15, 2006
- Record last updated
- May 20, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (508) 425-5951
- Medicaid ID
- 110052059A MA
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 686 in Massachusetts → Look up another NPI →
Also registered at 385 Southbridge St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Achal Aggarwal, MDPediatrics Physician1548234800
- Jeffrey Benoit, MS, PTPhysical Therapist1386691525
- Marc Braithwaite, O.D.Optometrist1780641357
- Beth Bylund, PTPhysical Therapist1679553721
- Helen Collette, NPNurse Practitioner1376731679
- Brooke Di Anni, D.O.Pediatrics Physician1174580302
Verify Michael S. Kelfer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 70572Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% more Medicare Part D claims than the average gastroenterology physician in 2024
1,171 Medicare Part D claims for 816 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Gavilyte-G512 claims
- Omeprazole348 claims
- Peg-3350 And Electrolytes76 claims
- Gavilyte-C75 claims
- Pantoprazole Sodium61 claims
- Sod Sulf-Potass Sulf-Mag Sulf26 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.
Michael S. Kelfer among 686 gastroenterology physician records in Massachusetts
Michael S. Kelfer, MD is one of 686 gastroenterology physician records with a practice address in Massachusetts. 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 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 49% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2019 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Massachusetts
There are 686 gastroenterology physician records in Massachusetts.
All 686 in Massachusetts → Every provider in Auburn → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Jonathan Taylor, MDAuburn, MA 015011205800158
- Elliot Feinberg, M.D.Leominster, MA 014531962442491
- Mariann Padron Gleich, M.D.Leominster, MA 014531578721049
- Naveen Pandaraboyina, MDLeominster, MA 014531073533485
- Amin Soltani, M.D.Leominster, MA 014531912361643
- Min Soo Song, MD.,CMLeominster, MA 014531053575340
- Vernu Visvalingam, MDLeominster, MA 014531396700274
- Wankin Yu, MDLeominster, MA 014531477639656
Common questions
What is Michael S. Kelfer, MD's NPI number?
Michael S. Kelfer, MD's National Provider Identifier (NPI) is 1306810296, issued on Feb 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael S. Kelfer, MD located?
The NPPES record lists a practice address at 385 Southbridge St, Auburn, MA, 01501. Phone: (508) 425-5446. Providers update this record themselves, so call before visiting.
How can I verify Michael S. Kelfer, MD's license?
NPPES lists Massachusetts license number 70572, 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 Michael S. Kelfer, MD prescribe under Medicare Part D?
In 2024, Michael S. Kelfer, MD had 1,171 Medicare Part D claims for 816 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.