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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (1)

The overall average patient rating of Dr. Marcus Koss is Good. Dr. Koss has been reviewed by 6 patients who have provided 1 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 1.0
Promptness 2.3
Courteous Staff 2.3
Accurate Diagnosis 3.7
Bedside Manner 3.7
Spends Time with Me 2.3
Follows Up After Visit 1.0

Specialties & Research

Dr. Marcus Koss, DO, MD is board certified in Family Medicine.

Education & Awards

Dr. Koss graduated from Wayne State University, Detroit.


Dr. Koss has 12 hospital affiliations:

  • St. Joseph Mercy Oakland 
  • Providence Hospital and Medical Center 


  • English

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Additional Information
Dr. Marcus E Koss DO and MD is a male Family Practitioner, has 12 years of experience and practices in Family Medicine.
Where does Dr. Marcus E. Koss practice?
Dr. Marcus Koss has 6 office locations.
Dr. Marcus Koss practices Family Medicine near Roseville, MI.
Additional practice locations include: Northville, MI and New Hudson, MI.
See Roseville Primary Care Doctors.