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 / MI

MARK F GRENQUIST, DO

HOSPITALIST

Medical school: MICHIGAN STATE UNIVERSITY COLLEGE OF HUMAN MEDICINE

Graduated: 2001

Also: INTERNAL MEDICINE

NPI: 1942300454

Practice Locations (1)

APOGEE MEDICAL GROUP MICHIGAN PC

200 N MARSHALL AVE

MARSHALL, MI 490681143

2697898227

Source: CMS National Downloadable File, September 2026.