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Dr. John Vernon, MD

Dr. John Vernon, MD

Age 46 Internal Medicine M
(26) 26 reviews

Telehealth available

Accepting New Patients


Dr. John Vernon, MD is a internal medicine specialist in Saint Louis, MO. Dr. Vernon completed a residency at St Johns Mercy Med Center. He currently practices at Mercy Clinic Internal Medicine and is affiliated with Barnes-Jewish St. Peters Hospital. He accepts multiple insurance plans. Dr. Vernon is board certified in Internal Medicine.


  • St Johns Mercy Med Center, Residency Hospital

Insurance Accepted

  • Aetna
  • Anthem
  • Anthem Blue Cross Blue Shield
  • Blue Cross Blue Shield
  • Cigna
  • HealthLink
  • Humana
  • MultiPlan

* Please verify this information when scheduling an appointment.


  1. Mercy Clinic Internal Medicine

    1. 1
      Mercy Clinic Internal Medicine - Olivemason
      12680 Olive Blvd Ste 100, Saint Louis, MO 63141 Existing Patients: (314) 251-8900

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Dr Vernon is just the greatest doctor. He is very attentive and genuinely interested in my health.
— Apr 16, 2019
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Dr. John Vernon, MD
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Frequently Asked Questions

Dr. Vernon frequently treats Noninfectious Gastroenteritis and Colitis, Osteoporosis, and Abnormal Thyroid.  

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Hospital Affiliations

  • Barnes-Jewish St. Peters Hospital
  • Mercy Hospital St. Louis
  • SSM Health St. Joseph Hospital - St. Charles