Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1104393891 Individual Practitioner Female Practitioner

Mariah Hamilton , PA-C

Physician Assistant • Greenfield, MA

Professional Overview & Biography Verified Profile Summary

Mariah Hamilton, PA-C is a registered healthcare professional specializing in Physician Assistant in Greenfield, MA. Practice services are available at 329 CONWAY ST under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

329 Conway St

Greenfield, MA 013011521

Telephone 4137746301
Fax 8666440871
Associated Practice Facility / Clinic
🏢 Valley Medical Group, P.c. Facility NPI 1912924705

Specialty Benchmarks & Practice Insights

Comparative analytics for Physician Assistant in Greenfield, MA

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 9.8 Yrs
State Avg: 10.0 Yrs
Regional Practice Density
10 Specialists

Practicing in Greenfield, MA (4746 Statewide)

Telehealth Adoption Rate
40.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

CMS Verified: 2026-07-13
Physician Assistant Primary Specialty

NUCC Taxonomy Code: 363A00000X

State License MA PA6829

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

Secondary Practice Locations

238 Northampton St

Easthampton, MA 010271046

Phone: 4135299300

31 Hall Dr

Amherst, MA 010022751

Phone: 4132568561

70 Main St

Florence, MA 010621466

Phone: 4135868400

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners
Marjorie Sobil , RD, LDN

Dietitian, Registered

NPI 1013199652

Registered Dietitian, Licensed Dietitian Nutritionist

Barbara Berthiaume , APRN

Nurse Practitioner - Family

NPI 1053736629

Advanced Practice Registered Nurse

NPI 1063484038

Doctor of Medicine (M.D.)

Rebecca Bucala , PT

Physical Therapist

NPI 1093004137

Physical Therapist

Jo Stearns , PA

Physician Assistant

NPI 1093759078

Physician Assistant

Lindsey Swank , FNP-BC

Nurse Practitioner - Family

NPI 1104491166

Family Nurse Practitioner (Board Certified)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

9 Historical Events
📍
Updated Practice Location July 13, 2026

Registered at 329 CONWAY ST, GREENFIELD, MA 013011521 (Tel: 4137746301)

📍
Updated Business Mailing Address July 13, 2026

Registered at 329 CONWAY ST, GREENFIELD, MA 013011521 (Tel: 4137746301)

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) February 13, 2019

Physician Assistant (License #PA6829 in MA)

NPI Profile Active October 31, 2018

NPI status registered as active in NPPES database

📍
Updated Practice Location October 31, 2018

Registered at 55 FRUIT ST, BOSTON, MA 021142696 (Tel: 6177262000)

📍
Updated Business Mailing Address October 31, 2018

Registered at 11 EUGENIA RD, BOSTON, MA 021314001

👤
Provider Name / Credentials Updated October 31, 2018

Recorded as MARIAH HAMILTON, PA-C

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) October 31, 2018

Physician Assistant (License #PA6829 in MA)

🟢
Initial NPI Registration & Enumeration October 31, 2018

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1104393891
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: October 31, 2018
Last Update: July 13, 2026
Sole Proprietor: No

Mailing Address

329 Conway St

Greenfield, MA 013011521

Phone: 4137746301

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.