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

Dr. Katherine Seiler Harkess, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1295116143

Dr. Katherine Seiler Harkess, MD is an Obstetrics/Gynecology in O Fallon, Missouri. Qualified in 2015, 11 years ago. Practices with Hh Physicians Network, a 108-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
11
Licensed in
MO
In the registry since
2015
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

300 Winding Woods Dr Ste 200
O Fallon, MO 63366
Phone: (636) 240-0130
Fax: (636) 240-6822
Show map & directions

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

Additional practice locations (2)

  • 15945 Clayton Road Suite 305, Ballwin, MO 63011-8221 — (636) 256-5090
  • 615 S New Ballas Rd, Saint Louis, MO 63141-8221 — (314) 251-6062

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 2019026841 (MO)

Record details

NPI number1295116143
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 16, 2015
Last updated in NPPESMarch 25, 2020
Certification dateMarch 25, 2020

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Hh Physicians Network — 108 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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