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

KRISTIN M ONEIL CALLAHAN, MD

INTERNAL MEDICINE

Medical school: GEORGETOWN UNIVERSITY SCHOOL OF MEDICINE

Graduated: 1999

Offers telehealth

NPI: 1215985445

Practice Locations (1)

MASS GENERAL BRIGHAM MEDICAL GROUP NORTHERN MASSACHUSETTS INC

104 ENDICOTT ST, SUITE 104

DANVERS, MA 019233688

9788826700

Source: CMS National Downloadable File, September 2026.

KRISTIN ONEIL CALLAHAN, MD | HealthCareAtlasUSA