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

Timothy D Grinnell, PA-C

Individual provider Physician Assistant · NPI 1790828119

Timothy D Grinnell, PA-C is a Physician Assistant in Waltham, Massachusetts. Qualified in 2006, 20 years ago. Practices with Northeast Orthopaedic Alliance PLLC, a 289-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
20
Licensed in
MA
In the registry since
2007
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

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Practice location Address checks out

840 Winter St
Waltham, MA 02451-1433
Phone: (781) 890-2133
Fax: (781) 890-2177
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 110 Liberty St, Brockton, MA 02301-5521 — (508) 565-3055

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence PA2274 (MA)

Record details

NPI number1790828119
Entity typeIndividual (Type 1)
GenderMale
Credentials PA-C
Sole proprietorNo
NPI enumeratedFebruary 15, 2007
Last updated in NPPESNovember 5, 2024
Certification dateNovember 5, 2024

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2006 (20 years in practice)
Group practice Northeast Orthopaedic Alliance Pllc — 289 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Other providers in Waltham