Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Alexa Jo Duling Williams, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1972033652

Alexa Jo Duling Williams, MD is an Obstetrics/Gynecology in O Fallon, Missouri. Graduated from University of Arizona College of Medicine in 2017, 9 years ago. Practices with SSM Medical Group Inc, a 560-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
9
Trained at
University of Arizona College of Medicine
Licensed in
MO
In the registry since
2017
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1101 Highway K
O Fallon, MO 63366-8431
Phone: (636) 379-6363
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 12700 Southfork Rd Ste 230, Saint Louis, MO 63128-3276 — (314) 849-3711
  • 615 S New Ballas Rd, Saint Louis, MO 63141-8221 — (314) 251-6062

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 2021013439 (MO)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence 2017019537 (MO)

Record details

NPI number1972033652
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 15, 2017
Last updated in NPPESNovember 10, 2025
Certification dateNovember 10, 2025
Mailing addressPo Box 955534, Saint Louis, MO 63195-5534

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolUNIVERSITY OF ARIZONA COLLEGE OF MEDICINE
Graduated 2017 (9 years in practice)
Group practice Ssm Medical Group Inc — 560 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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