Meet the Providers

At Commerce Internal Medicine in Commerce Township, Michigan, our highly qualified doctors, physician assistant, and professional support staff provide exceptional care for you and your family. From the time you make your appointment until you walk out the door, you will receive attentive service and individualized care from all of our healthcare professionals and staff.

To schedule an appointment, call our office at (248) 363-1500 or use our online appointment request form.

Norman Markowitz, MD

Norman Markowitz, MD

Board Certified in Internal Medicine

  • Established Commerce Internal Medicine in 1990
  • Board Certified by the American Board of Internal Medicine since 1990
  • Recertified: 2002-2012; 2012-2022
  • Internal Medicine Residency: William Beaumont Hospital, Royal Oak, MI (1987-1990)
  • Medical Degree: Wayne State University School of Medicine (1983-1987)
  • Professional Memberships: American Medical Association, American College of Physicians, Michigan State Medical Society, Oakland County Medical Society

Thomas H. Li, MD

Thomas Li, MD

Board Certified in Internal Medicine

  • Joined Practice in 2001
  • Board Certified by the American Board of Internal Medicine since 2001
  • Recertified: 2011-2021
  • Internal Medicine Residency: William Beaumont Hospital, Royal Oak, MI (1998-2001)
  • Medical Degree: Wayne State University School of Medicine (1994-1998)
  • Master of Public Health (MPH): Hospital and Molecular Epidemiology, University of Michigan (1992-1994)
  • Professional Memberships: American Medical Association, American College of Physicians, Michigan State Medical Society, Oakland County Medical Society

Kimberly Cantillon, MPAS, PA-C

Kimberly Cantillon, MPAS, PA-C

Certified Physician Assistant

  • Joined Practice in 2012
  • Certified Physician Assistant (PA-C)
  • Master in Physician Assistant Studies (MPAS): Wayne State University, Detroit, MI 
  • BLS certified: Wayne State University
  • Bachelor of Arts in Women's Studies with focus on Women's Health 
  • Special interest in cardiovascular disease risk reduction, women's health, patient education and diabetes education and management