Ruth A. McLain, M.D.
Internal Medicine Physician · Randolph, MA
Ruth A. McLain, M.D. is an internal medicine physician with a practice address in Randolph, Massachusetts, and NPI 1871526178, issued on Jul 9, 2006. Check the license (Massachusetts 37255, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Ruth A. McLain
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 37255 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Credit Union Way, Randolph, MA 02368
- Phone
- (781) 341-4145
- Enumerated
- Jul 9, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (781) 297-7345
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 1 Credit Union Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sterling Bouxman, N.P.Acute Care Nurse Practitioner1023072246
Verify Ruth A. McLain in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 37255Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
150 Medicare Part D claims for 19 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Potassium Chloride15 claims
- Pantoprazole Sodium13 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.
Ruth A. McLain among 6,825 internal medicine physician records in Massachusetts
Ruth A. McLain, M.D. 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).
Internal Medicine Physician providers in Massachusetts
There are 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Randolph → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ann Glasman, MDRandolph, MA 023681699883736
- Marie Monestime, NURSE PRACTITIONERRandolph, MA 023681407718398
- Maria Rodrigues, M.D.Randolph, MA 023681750350708
- Thomas Castiglione, M.D.Kingston, MA 023641770553539
- Thomas Cody, M.D.Kingston, MA 023641225104912
- Adnan El-Amine, M.D.Kingston, MA 023641588722979
- Mara Linscott, MDKingston, MA 023641457458614
- Jonathan Metzger, MDKingston, MA 023641376524314
Common questions
What is Ruth A. McLain, M.D.'s NPI number?
Ruth A. McLain, M.D.'s National Provider Identifier (NPI) is 1871526178, issued on Jul 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ruth A. McLain, M.D. located?
The NPPES record lists a practice address at 1 Credit Union Way, Randolph, MA, 02368. Phone: (781) 341-4145. Providers update this record themselves, so call before visiting.
How can I verify Ruth A. McLain, M.D.'s license?
NPPES lists Massachusetts license number 37255, 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 Ruth A. McLain, M.D. prescribe under Medicare Part D?
In 2024, Ruth A. McLain, M.D. had 150 Medicare Part D claims for 19 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.