William M. Gaines, MD
Internal Medicine Physician · Auburn, MA
William M. Gaines, MD is an internal medicine physician with a practice address in Auburn, Massachusetts, and NPI 1184684078, issued on Mar 24, 2006. Check the license (Massachusetts 56092, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- William M. Gaines
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 56092 MA
Self-reported in NPPES; status is on the state search - Practice location
- 385 Southbridge St, Auburn, MA 01501
- Phone
- (508) 721-1170
- Enumerated
- Mar 24, 2006
- Record last updated
- Mar 14, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (508) 832-0859
- Medicaid ID
- 3018598 MA
- Medicare enrollment
- Enrolled (PECOS I20100122000019); accepts Medicare assignment
- Medical or professional school
- Js Weill Medical College, Cornell University, 1983
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 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.
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- Helen Collette, NPNurse Practitioner1376731679
- Brooke Di Anni, D.O.Pediatrics Physician1174580302
Verify William M. Gaines in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 56092Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average internal medicine physician in 2024
6,477 Medicare Part D claims for 783 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 73 claims were for opioids.
Most prescribed
- Atorvastatin Calcium706 claims
- Lisinopril417 claims
- Amlodipine Besylate255 claims
- Omeprazole205 claims
- Metoprolol Succinate200 claims
- Hydrochlorothiazide195 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
- Reliant Medical Group IncWebster, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William M. Gaines among 6,825 internal medicine physician records in Massachusetts
William M. Gaines, MD 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 fileYes · 60% of these records are
- Graduated1983 · median 2004 among the 4,103 with a school on file
- Record last updated2019 · 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).
26 internal medicine physician records list a practice address in Auburn
They are 26 of the 432 NPPES records with a practice address in Auburn, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Auburn → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kevin Delacey, M.D.Auburn, MA 015011447231402
- Daniel Guilbert, MDAuburn, MA 015011144201732
- John Kelly, M.D.Auburn, MA 015011174599211
- Dennis Murphy, MDAuburn, MA 015011841266848
- Putcha Murthy, MDAuburn, MA 015011164493573
- Seema Naravane, MDAuburn, MA 015011821064478
- Natalie Osorio, MDAuburn, MA 015011215902846
- Ketaki Patel, M.D.Auburn, MA 015011801879846
Common questions
What is William M. Gaines, MD's NPI number?
William M. Gaines, MD's National Provider Identifier (NPI) is 1184684078, issued on Mar 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William M. Gaines, MD located?
The NPPES record lists a practice address at 385 Southbridge St, Auburn, MA, 01501. Phone: (508) 721-1170. Providers update this record themselves, so call before visiting.
How can I verify William M. Gaines, MD's license?
NPPES lists Massachusetts license number 56092, 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 M. Gaines, MD prescribe under Medicare Part D?
In 2024, William M. Gaines, MD had 6,477 Medicare Part D claims for 783 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.