Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Richard C McMahon, MD

Individual provider Internal Medicine Physician · NPI 1114949823

Richard C McMahon, MD is an Internal Medicine in Hudson, Massachusetts. Graduated from Tufts University School of Medicine in 1977, 49 years ago. Practices with Charles River Medical Associates, PC, a 119-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
49
Trained at
Tufts University School of Medicine
Licensed in
MA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

101 Coolidge St Downstairs
Hudson, MA 01749-1354
Phone: (978) 562-0757
Fax: (978) 562-9299
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 51250 (MA)

Record details

NPI number1114949823
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 24, 2006
Last updated in NPPESJanuary 17, 2024
Certification dateJanuary 15, 2024
Mailing address171 Main St Ste 203b, Ashland, MA 01721-1187

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1977 (49 years in practice)
Group practice Charles River Medical Associates, Pc — 119 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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