HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / MA

JASON SHAFFER, MD

FAMILY PRACTICE

Medical school: UNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL

Graduated: 2021

NPI: 1043898273

Practice Locations (3)

MASS GENERAL BRIGHAM MEDICAL GROUP NORTHERN MASSACHUSETTS INC

1 HUTCHINSON DR

DANVERS, MA 019233748

9787396950

MASS GENERAL BRIGHAM MEDICAL GROUP NORTHERN MASSACHUSETTS INC

1 WIDGER RD

MARBLEHEAD, MA 019452146

7816315726

CAMBRIDGE PUBLIC HEALTH COMMISSION

300 BROADWAY

SOMERVILLE, MA 021452935

6172847000

Source: CMS National Downloadable File, September 2026.