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

Katherine Onnen Ryken, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1487185633

Katherine Onnen Ryken, MD is an Obstetrics/Gynecology in Buffalo, New York. Qualified in 2017, 9 years ago. Licensed in Alaska, Colorado, Maine and New York and 1 more.

Years since qualifying
9
Licensed in
AK, CO, ME, NY, WA
In the registry since
2017
Specialties on file
5
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

565 Abbott Rd
Buffalo, NY 14220-2039
Phone: (206) 520-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 322155 (NY)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence 241504 (AK)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence MD61136628 (WA)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence MD29498 (ME)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence 0076454 (CO)

Record details

NPI number1487185633
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 21, 2017
Last updated in NPPESMarch 27, 2026
Certification dateMarch 27, 2026

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Accepts Medicare assignment Not indicated
Practice locations4 on file with Medicare

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