National Provider Identifier

Cassidy Grieco

Cassidy Grieco is listed in the NPPES registry with a primary specialty of Physician Assistant in Boston, MA and a listed phone number of (617) 421-1000.

NPI 1306428941Boston, MAPhysician Assistant

Source: public NPPES record, last updated November 20, 2025. This profile is informational and is not medical advice, a quality rating, or a provider recommendation.

Profile Overview

NPI
1306428941
Provider Type
Individual
Primary Specialty
Physician Assistant
Enumeration Date
April 23, 2021
Last Updated
November 20, 2025

Practice Location

  • 133 Brookline Ave
  • Boston, MA 02215-3904

Phone: (617) 421-1000

Specialties

  • Physician Assistant (363A00000X)
  • Student in an Organized Health Care Education/Training Program (390200000X)

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Biography

Cassidy Grieco, PA-C, is a Boston physician assistant affiliated with Atrius Health. Public profile information reports that she graduated with honors from Tufts University School of Medicine in 2022, and her professional background under the name Cassidy Youngberg includes internal medicine work at Atrius Health and earlier patient care experience at Newton-Wellesley Hospital.

Related Providers

These published providers share the same primary specialty and city. This is a directory relationship, not a recommendation or verified affiliation.

Full Record
NPI
1306428941
Entity Type
Individual
Last Name
Grieco
First Name
Cassidy
Provider Other Last Name
Youngberg
Provider Other First Name
Cassidy
Provider Other Credential Text
PA
Provider Other Last Name Type Code
1
Mailing Street Address
133 Brookline Ave
Mailing City
Boston
Mailing State
MA
Mailing ZIP Code
02215-3904
Mailing Country
US
Mailing Phone
(617) 421-1000
Practice Street Address
133 Brookline Ave
Practice City
Boston
Practice State
MA
Practice ZIP Code
02215-3904
Practice Country
US
Practice Phone
(617) 421-1000
Enumeration Date
April 23, 2021
Last Updated
November 20, 2025
Sex
Female
Sole Proprietor
No
Certification Date
November 20, 2025
Taxonomies
Physician Assistant (363A00000X), Student in an Organized Health Care Education/Training Program (390200000X)