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

JOEL W KNAACK, DO

INTERNAL MEDICINE

Graduated: 2006

NPI: 1841236460

Practice Locations (2)

NORTH MICHIGAN PHYSICIAN SERVICES PC

1100 E MICHGAN AVE

GRAYLING, MI 497381312

9893485461

GRAND TRAVERSE PHYSICIAN SERVICES PC

1105 6TH ST

TRAVERSE CITY, MI 496842345

2319355000

Source: CMS National Downloadable File, September 2026.

JOEL KNAACK, DO | HealthCareAtlasUSA