About John Rinker, DO

About Practice

Dr. John Rinker, DO, has been a leading family medicine practitioner for more than 33 years. While large corporations now run many medical practices, Dr. Rinker proudly owns and operates his family medicine clinic in Pontiac, Illinois.

Dr. Rinker is passionate about the doctor-patient relationship and never rushes through appointments. He takes the time to get to know each patient personally and works diligently to treat the underlying cause of every condition. Unlike large practices where patients may see any provider, Dr. Rinker meets with each patient who visits the clinic.

Dr. Rinker is a 1985 graduate of the Chicago College of Osteopathic Medicine at Midwestern University. At his practice, he specializes in family and emergency medicine. Board-certified in family medicine and osteopathic manipulative therapy, he's affiliated with several hospitals, including St. Margaret’s Hospital, St. Joseph’s Medical Center, and St. James Hospital.

In addition to family medicine, Dr. Rinker has served as a hospitalist, a hospice medical director, and an emergency room physician. He has diverse experience with annual physicals, well-child check-ups, immunizations, DOT physicals, urgent care, and chronic disease management. He also provides skin rejuvenation, lab services, women’s health services, and allergy management. He can also help regulate his patients’ hormonal health.

Dr. Rinker serves entire families from newborns to seniors with customized health care. 


Words from our patients

  • Healthgrades

    "Dr. Rinker has taken wonderful care of our family for over 28 years. We could not ask for anything more in all the years as his patients."

    Lisa F.
  • Vitals

    "Awesome doctor! He is well worth the wait. I couldn't find a better one if I tried."

    Verified Patient
  • Vitals

    "Dr. Rinker is very thorough and listens attentively. He is serious and genuinely cares for his patients."

    Verified Patient


John Rinker, DO
1515 W Reynolds Street
Pontiac, IL 61764
Phone: 815-201-5595
Fax: 815-842-2861

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