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

Casey C Younkin, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1659352656

Casey C Younkin, MD is an Obstetrics/Gynecology in Springfield, Illinois. Graduated from Washington University School of Medicine in 1983, 43 years ago. Practices with SIU Physicians and Surgeons Inc, a 316-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
43
Trained at
Washington University School of Medicine
Licensed in
IL
In the registry since
2005
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

415 N 9th St 6th Fl
Springfield, IL 62702-5317
Phone: (217) 545-5117
Fax: (217) 545-4912
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 421 N 9th St Bldg Q, Springfield, IL 62702-5317 — (217) 545-8000

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 036077173 (IL)

Record details

NPI number1659352656
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 8, 2005
Last updated in NPPESNovember 20, 2025
Certification dateNovember 20, 2025
Mailing addressPo Box 19639, Springfield, IL 62794-9639

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1983 (43 years in practice)
Group practice Siu Physicians And Surgeons Inc — 316 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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