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Missouri

Primary care physicians in O'Fallon, MO

The federal NPI Registry lists 5 primary care physicians with a practice address in O'Fallon.

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O'Fallon at a glance

residents (2023 Census estimate)
94,074
County
St. Charles
registered primary care physicians with an office here
5
per 100,000 residents (area average 63.4)
5.3
ZIP with the most offices
63368

Registered primary care physicians in O'Fallon

Alphabetical, from the federal NPI Registry (CMS), fetched 2026-11-06. Not a ranking or an endorsement; nobody pays to appear in this list. Confirm details with each office.

  • Alissa Ballard, DO

    Family Medicine

    2630 State Highway K Ste 100 · 63368

    636-240-5454

  • George Stachecki, MD

    Family Medicine

    2630 State Highway K Ste 100 · 63368

    636-240-5454

  • Michael Engel, MD

    Family Medicine

    1000 Technology Drive · 63368

    636-261-1600

  • Michael Williams, DO

    Family Medicine

    Ultra Wellness Medical, Llc 3026 Winghaven Blvd. · 63368

    636-333-9820

  • Rajiv Sadana, MD

    Internal Medicine

    844 Waterbury Falls Drive St Charles Cboc · 63368

    314-289-7676

Choosing a primary care physician in O'Fallon

  • Check the license with the Missouri State Board of Registration for the Healing Arts. DocInfo.org lists actions taken by state boards.
  • Ask whether the doctor is accepting new patients on your exact plan; HMO plans assign you to a primary care doctor.
  • Ask which hospital the doctor admits to and whether telehealth visits are offered.
  • Family medicine treats all ages; internal medicine treats adults only.

Questions people ask

How many primary care physicians practice in O'Fallon?
The federal NPI Registry lists 5 primary care physicians with a practice address in O'Fallon. Source: CMS NPI Registry, practice-location addresses.
Can a practice sponsor the O'Fallon page?
Yes. This page has 1 sponsor position, sold for a flat monthly fee and always labeled "Sponsored". Organic listings are never for sale.

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