Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Katherine Williamson, DO

Individual provider Obstetrics & Gynecology Physician · NPI 1134530546

Katherine Williamson, DO practises Obstetrics/Gynecology in Cincinnati, Ohio. Qualified in 2014, 12 years ago. Practices with Mercy Health Physicians Cincinnati Specialty Care LLC, a 344-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
12
Licensed in
OH
In the registry since
2014
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

796 Old State Route 74
Cincinnati, OH 45245-1262
Phone: (513) 564-2700
Fax: (513) 297-4469
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 525 Alexandria Pike Ste 2300, Southgate, KY 41071-3290 — (513) 564-2700

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 35C.003185 (OH)

Record details

NPI number1134530546
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 20, 2014
Last updated in NPPESJanuary 8, 2026
Certification dateJanuary 8, 2026

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Mercy Health Physicians Cincinnati Specialty Care Llc — 344 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of the uterus 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients29
Services billed 59 a service is one billed item, such as a visit, a test or a procedure
Average patient age68

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Mercy Health Physicians Cincinnati Specialty Care LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 344 clinicians in the practice; 12 are shown here.

Other providers in Cincinnati