Memorial Healthcare Internal Medicine (Owosso)

300 Health Park Drive
Suite 302
Owosso MI 48867

Phone: 989-723-5540

Fax: 989-720-2292

Monday: 8:00 AM - 5:00 PM
Tuesday: 8:00 AM - 5:00 PM
Wednesday: 8:00 AM - 5:00 PM
Thursday: 8:00 AM - 5:00 PM
Friday: 8:00 AM - 3:00 PM

300 Health Park Drive, Owosso MI 48867

Get Directions

Memorial Healthcare Internal Medicine is the medical practice of Doctors Oscar Macal, MD, FACP and Antonio Santiago, MD, FACP plus Jason Ardelean, board certified Nurse Practitioner. The practice provides outstanding healthcare to adults in the greater Shiawassee county region including wellness management and the diagnosis and treatment of adult related illnesses and conditions.

Memorial Healthcare Internal Medicine is a Blue Cross Blue Shield designated Patient Centered Medical Home.

Click here for a Patient-Centered Medical Home Brochure.

New Patients Welcome. Call Today!



  • Annual physicals and exams
  • Illness diagnosis/treatment
  • Injury assessment/management
  • Chronic disease management
  • Wellness education

Memorial Healthcare Internal Medicine is an employed physician practice of Memorial Medical Associates, a department of Memorial Healthcare.