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

JOHN CASEY HEFFERNAN, DO

INTERNAL MEDICINE

Graduated: 2017

Offers telehealth

NPI: 1750818019

Practice Locations (1)

PROVIDENCE HEALTH AND SERVICES - WASHINGTON

380 CHASE AVE

WALLA WALLA, WA 993622924

5098973333

Source: CMS National Downloadable File, September 2026.

JOHN HEFFERNAN, DO | HealthCareAtlasUSA