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DR. KATHERINE SEILER HARKESS M.D.
NPI 1295116143
Obstetrics & Gynecology in O'fallon, MO

Active since June 16, 2015PECOS EnrolledAccepts Medicare Assignment
300 WINDING WOODS DRIVE SUITE 200, O'FALLON, MO 63366(636) 240-0130(636) 240-6822 Get Directions Write a Review

NPPES record last updated: March 25, 2020. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 25, 2020, Aug 1, 2019 (2 updates tracked since 2019).

About Dr. Katherine Seiler Harkess M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. KATHERINE SEILER HARKESS M.D. (NPI 1295116143) is an individual obstetrics & gynecology provider in O'fallon, Missouri, licensed in Missouri (2019026841) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2015).

NPPES Registry Identity

NPI1295116143
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. KATHERINE SEILER HARKESSCredential: M.D.
Location Address300 WINDING WOODS DRIVE SUITE 200O'fallon, MO 63366
Mailing Address300 Winding Woods Drive Suite 200O'fallon, MO 63366 · (636) 240-0130 · Fax (636) 240-6822
Phone(636) 240-0130
Fax(636) 240-6822
Sole ProprietorYes
Medical School CMSOtherGraduated 2015
Enumeration DateJune 16, 2015
Last NPPES UpdateMarch 25, 20202 updates tracked since enumeration
NPPES CertifiedMarch 25, 2020
✔ NPI 1295116143 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in MO · 2019026841
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
300 WINDING WOODS DRIVE SUITE 200, O'fallon, MO 63366
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1615 S New Ballas Rd, Ob/GynSaint Louis, MO 63141-8221 · Phone (314) 251-6062 · Fax (314) 251-4376
Location 215945 Clayton Road Suite 305Ballwin, MO 63011-8221 · Phone (636) 256-5090

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Magnolia Health, Ambetter Health, Ambetter of Alabama and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Katherine Seiler Harkess M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID547576449
PECOS Enrollment IDI20200827000803
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63366 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Katherine Harkess's NPI number?

The NPI number for Katherine Harkess is 1295116143. It was assigned to this individual provider in the NPPES registry on June 16, 2015.

Where is Katherine Harkess located?

Katherine Harkess practices at 300 Winding Woods Drive Suite 200, O'fallon, MO 63366. The listed phone number is (636) 240-0130.

What is Katherine Harkess's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Katherine Harkess enrolled in Medicare?

Yes. Katherine Harkess is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Katherine Harkess accept?

Health plans from Ambetter Health, Ambetter from Magnolia Health, Ambetter of Alabama, Ambetter of Tennessee and Blue Cross and Blue Shield of Alabama and 3 other insurers list Katherine Harkess as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Katherine Harkess was last updated on March 25, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.