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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 (3)

The overall average patient rating of Dr. Daryl Zelenak is Good. Dr. Zelenak has been reviewed by 4 patients who have provided 3 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 4.6
Promptness 4.1
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

  • He has special expertise in 3 areas:
  • Colonoscopy
  • Fecal Incontinence
  • Ulcerative Colitis

Education & Awards

Dr. Zelenak graduated from Michigan State University College of Osteopathic Medicine, East Lansing.


Dr. Zelenak has 12 hospital affiliations:

  • Mount Clemens Regional Medical Center 
  • Genesys Health System 


  • English

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Additional Information
Dr. Daryl Zelenak DO is a male Ophthalmologist, has 14 years of experience and practices in Ophthalmology.
Where does Dr. Daryl Zelenak practice?
Dr. Daryl Zelenak has 5 office locations.
Dr. Daryl Zelenak practices Ophthalmology near Bay City, MI.
Additional practice locations include: Midland, MI and Lapeer, MI.
See Bay City Ophthalmologists.