John J. O'Brien, MD

John J. O'Brien, MD, Mercy
Family Medicine
Mercy Clinic
E-Visits, Schedule Online


Location and Contact Information

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Mercy Clinic Family Medicine - WingHaven

  • 2223 Technology Drive
    Suite 35
  • O Fallon, MO 63368

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About John J. O'Brien, MD

I consider it both humbling and an honor to be the "Family Doctor" to so many patients, having cared for up to five generations of a single family. My partners and I strive to manifest the healing presence of Jesus to our patients. Medical decisions should be a joint effort between me and my patients, who can be assured of care that is not tainted by allegiance to any medical group or limitations imposed by third party payers.

  • Specialty
    • Family Medicine
  • Residency
    • Mercy Hospital Saint Louis-Family Medicine
  • Medical School
    • University of Missouri School of Medicine
  • Mercy Affiliations
    • Mercy Hospital St. Louis
  • Board Certification
    • American Board of Family Medicine

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