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 / WA

MARGARET MARY MASS, MD

FAMILY PRACTICE

Medical school: UNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)

Graduated: 2022

Offers telehealth

NPI: 1083343107

Practice Locations (1)

THE POLYCLINIC PLLC

509 OLIVE WAY, 900 THE POLYCLINIC DOWNTOWN

SEATTLE, WA 981011724

2068604700

Source: CMS National Downloadable File, September 2026.

MARGARET MASS, MD | HealthCareAtlasUSA