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Active NPI 1457762106 Individual Practitioner Male Practitioner

Aaron Grinstein , PA

Physician Assistant • Easthampton, MA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Aaron Grinstein, PA is a certified Physician Assistant practicing in Easthampton, MA. With approximately 13 years of clinical experience since completing medical education in 2013, Aaron Grinstein delivers high-quality medical care to the local community at 238 NORTHAMPTON ST.

Aaron Grinstein is affiliated with Valley Medical Group Pc and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit, automated urinalysis test. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

238 Northampton St

Easthampton, MA 010271046

Telephone 4135299300
Fax 8666440870
Associated Practice Facility / Clinic
🏢 Valley Medical Group, P.c. Facility NPI 1174687966

Medicare Profile & Education

Medical School

Other

Graduation Year

2013

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Physician Assistant in Easthampton, MA

Established Specialist (10-20 Yrs)
Practitioner Clinical Experience
13 Yrs +5.6 yrs vs City Avg
City Avg: 7.4 Yrs
State Avg: 10.0 Yrs
Regional Practice Density
7 Specialists

Practicing in Easthampton, MA (4746 Statewide)

Telehealth Adoption Rate
85.7% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
60.2% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Grinstein (13 Years) 13 Yrs
Easthampton Specialty Average (7.4 Years) 7.4 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2023)
Reporting Year:
HCPCS Code & Description Services Patients Submitted Charge Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
187 156 $300.00 $111.35
99213 Established patient office or other outpatient visit, typically 15 minutes
61 60 $220.00 $78.87
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
24 24 $235.79 $112.07
81003 Automated urinalysis test
13 11 $10.00 $2.20

Medical Specialties & State Licenses

CMS Verified: 2025-02-25
Physician Assistant Primary Specialty

NUCC Taxonomy Code: 363A00000X

State License MA PA4966

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.

Physician Assistant

NUCC Taxonomy Code: 363A00000X

State License HI AMD-875

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.

Physician Assistant - Medical

NUCC Taxonomy Code: 363AM0700X

State License MA PA4966

Definition to come...

Additional State Medicaid & Healthcare Payer Identifiers

Commercial Insurance / Payer ID Ma
PA4966 (MA)

Hospital & Practice Group Affiliations

Valley Medical Group Pc

238 Northampton St, Easthampton, MA 010271046

Phone: 4135299300

Valley Medical Group Pc

70 Main St, Florence, MA 010621466

Phone: 4135868400

Secondary Practice Locations

31 Hall Dr

Amherst, MA 010022751

Phone: 4132568561

70 Main St

Florence, MA 01062

Phone: 4135868400

329 Conway St

Greenfield, MA 013011521

Phone: 4137746301

Practice Associates & Co-Workers

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

38 Associated Practitioners
Hannah Wzorek , FNP

Nurse Practitioner - Family

NPI 1033595335

Family Nurse Practitioner

Annastasia Fernandes , NP

Nurse Practitioner - Psychiatric/Mental Health

NPI 1083653703

Nurse Practitioner

Dr. Nora Wilson , DPT

Physical Therapist

NPI 1093230914

Doctor of Physical Therapy

NPI 1093991267

Doctor of Medicine (M.D.)

NPI 1114986460

Doctor of Medicine (M.D.)

Pamela Brigham , MSW, LICSW

Social Worker - Clinical

NPI 1134368905

Master of Social Work, Licensed Independent Clinical Social Worker

Career & Practice History Timeline

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

14 Historical Events
📍
Updated Practice Location March 10, 2025

Registered at 238 NORTHAMPTON ST, EASTHAMPTON, MA 010271046 (Tel: 4135299300)

📍
Updated Business Mailing Address March 10, 2025

Registered at 238 NORTHAMPTON ST, EASTHAMPTON, MA 010271046 (Tel: 4135299300)

📍
Updated Practice Location March 28, 2023

Registered at 70 MAIN ST, NORTHAMPTON HEALTH CENTER, FLORENCE, MA 01062 (Tel: 4135868400)

📍
Updated Business Mailing Address March 28, 2023

Registered at 70 MAIN ST, NORTHAMPTON HEALTH CENTER, FLORENCE, MA 01062 (Tel: 4135868400)

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) March 28, 2023

Physician Assistant (License #AMD-875 in HI)

📍
Updated Business Mailing Address May 04, 2021

Registered at 329 CONWAY ST, GREENFIELD, MA 013011521 (Tel: 1377463014)

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) May 04, 2021

Physician Assistant (License #PA4966 in MA)

📍
Updated Business Mailing Address December 28, 2018

Registered at 2180 MAIN ST, WAILUKU, HI 967931625 (Tel: 8082426464)

NPI Profile Active June 22, 2016

NPI status registered as active in NPPES database

📍
Updated Practice Location June 22, 2016

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

📍
Updated Business Mailing Address June 22, 2016

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

👤
Provider Name / Credentials Updated June 22, 2016

Recorded as AARON GRINSTEIN, PA

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) June 22, 2016

Physician Assistant (License #PA4966 in MA)

🟢
Initial NPI Registration & Enumeration May 15, 2014

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: 1457762106
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: May 15, 2014
Last Update: March 10, 2025
Sole Proprietor: No

Mailing Address

238 Northampton St

Easthampton, MA 010271046

Phone: 4135299300

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.