Internal Medicine

About Us

The OMH Internal Medicine office is located in Suite 140 inside the OMH Professional Medical Building at 829 N. Center Avenue in Gaylord, Michigan. The OMH Professional Medical Building is linked via an internal walkway to the main Hospital facility.

OMH also offers integrative medicine services with Mary Seger, PhD, GNP. Her office is located inside the OMH Internal Medicine suite, and she can be contacted by calling that office number.

OMH Internal Medicine has been designated a Blue Cross Blue Shield of Michigan Patient Centered Medical Home. A Patient-Centered Medical Home (PCMH) is a trusting partnership between a doctor led health care team and an informed patient. It includes an agreement between the doctor and the patient that acknowledges the role of each in a total health care program. To learn more about PCMH, please click here to download our brochure.


Office Hours:

Monday - Friday
8:00 a.m. - 5:00 p.m.


Suite 140
829 N Center Ave
Gaylord, MI 49735
Get Directions



After hours:




The OMH Internal Medicine Provider Team

Changxin Li, MD

Matthew A. Mazur, DO

Steven Wisniewski, MD


Shawn Bahleda, PA-C

Mary Seger, PhD, GNP

Rose Mary Spellman, FNP