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 / OK

MARY ELLEN CHANG, DO

EMERGENCY MEDICINE

Graduated: 2020

NPI: 1649891987

Practice Locations (1)

IES ER OKLAHOMA LLC

6161 S YALE AVE

TULSA, OK 741361902

9184942200

Source: CMS National Downloadable File, September 2026.

MARY ELLEN CHANG, DO | HealthCareAtlasUSA