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Internal Medicine

Richard C. McMahon, MD

Works at hospitals in Marlborough, MA · Worcester, MA · Massachusetts

Summary

Richard C. McMahon, MD (Internal Medicine) is listed by Medicare at 2 hospitals in Marlborough, MA and Worcester, MA. NPI 1114949823. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Richard C. McMahon, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Internal MedicinePrimary specialty
YesAccepts Medicare assignment
YesOffers telehealth
49Years since medical school (graduated 1977)
Tufts University School Of MedicineMedical school
MaleGender (as listed)
Charles River Medical Associates, PCGroup practice (+1 more)

Quick answers

Which hospitals does Richard C. McMahon work at?
Medicare's official clinician data lists Richard C. McMahon at 2 hospitals: Marlborough Hospital and UMass Memorial Medical Center/University Campus. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Richard C. McMahon see patients?
Medicare's clinician data lists 2 practice locations, including Hudson, MA. Call before your visit to confirm the address.
What is Richard C. McMahon's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Richard C. McMahon accept Medicare assignment?
Yes. Medicare's clinician data says Richard C. McMahon accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
Does Richard C. McMahon offer telehealth?
Medicare's clinician data says Richard C. McMahon offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Richard C. McMahon?
(978) 562-3536, as listed in official Medicare / NPI Registry data.
What is Richard C. McMahon's NPI number?
1114949823. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Richard C. McMahon works

Medicare's Facility Affiliation Data lists Richard C. McMahon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Richard C. McMahon is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Richard C. McMahon as a member of these groups (CMS data updated 2026-10-02).

  • Charles River Medical Associates, PC119 clinicians in the group
  • Kablotsky Internal Medicine PLLC7 clinicians in the group

Specialties

Find other Internal Medicine doctors in Massachusetts →

Other internal medicine doctors in Hudson

Clinicians with the same Medicare primary specialty in Hudson, MA — not a recommendation.

All internal medicine doctors in Hudson →

Clinician information

CredentialMD
Medical schoolTufts University School Of Medicine
Graduation year1977
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1114949823
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians