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 Munson Medical Center at 231-935-5000.


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

Natalie Harter, LMSW

Natalie received her Master of Social Work degree from Grand Valley State University in 2003 and is licensed by the State of Michigan as a Clinical Social Worker. Natalie has worked in the clinical social work field for 20 years and has extensive experience relative to chronic illness, substance abuse, head injuries, hospice and home care.

Practice Manager

  • Keisha Sexton, CMM, BBA

Population Health Manager

  • Christina

Clinical Staff

  • Tina

  • Megan

  • Dawn

  • Stacie

  • Erika

Office Staff

  • Donelle

  • Brandie

  • Lisa

  • Ashley

Research Division

  • Karla Blackmer, CCRC

  • Lydia Baker

  • Mariah