Office Hours

Monday - Friday

7:30 am - 5:00 pm


Saturday - Sunday



Office Phone & Fax

Office Phone: 231-269-4185

Office Fax: 231-269-4461



Acute Walk-ins

Monday - Friday

11:00 - 11:45 am

4:00 - 4:45 pm


24 Hour Care

For non-emergency care outside normal business hours, please call 231-269-4185 and leave a message.  You may also have the NPHC physician-on-call paged by contacting our after hours call service vendor, All Service Message Center, at 616-512-5511.


In cases of emergency, please visit the nearest emergency room or call 911.



Owner / Primary Physician / Medical Director

  • Mitzie Hewitt, DO, CPI

Nurse Practitioner

Alexander Cooper, NP-C

Alex is a nationally certified Family Nurse Practitioner. He received his Associates degree in nursing from Bay College in Esacaba, MI and went on to earn a Master of Science in Nursing from Frontier Nursing University.  Alex is a former U.S. Army combat medic and is active in a veteran based volunteer disaster response organization.

Physician Assistant

Heidi Szerlong, MPA, PA-C

Heidi received her Bachelors degree in Dietetics from Michigan State University, East Lansing, MI, and her Master of Physician Assistant from Medical College of Georgia, Augusta, GA. Heidi is a registered dietitian and is nationally certified as a physician assistant.

Care Manager

  • Amanda Ocobock, BSN, RN

Practice Manager

  • Keisha Sexton, CMM, BBA

Administrative Assistant

  • Ashley

Clinical Staff

  • Tina

  • Megan

  • Dawn

  • Stacie

  • Erika

Office Staff

  • Donelle

  • Brandie

  • Lisa

  • Jennifer

Research Division

  • Karla Blackmer, CCRC

  • Lydia Baker

  • Mariah