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 / IL

JOHN ALAN DEMASK, DO

FAMILY PRACTICE

Medical school: CHICAGO COLLEGE OF OSTEOPATHY

Graduated: 1993

NPI: 1174501134

Practice Locations (1)

24724 W EAMES ST

CHANNAHON, IL 604105446

8154675100

Source: CMS National Downloadable File, September 2026.

JOHN DEMASK, DO | HealthCareAtlasUSA