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

John Jeffrey Williamson, PA

Individual provider Physician Assistant · NPI 1245338896

John Jeffrey Williamson, PA is a Physician Assistant in Bloomington, Illinois. Qualified in 1999, 27 years ago. Practices with Osf Multi-Specialty Group, a 2,128-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
27
Licensed in
IL
In the registry since
2006
What do these letters mean?
PA — Physician Assistant
A licensed clinician who examines, diagnoses and treats under a physician's supervision.

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Practice location Address checks out

1701 E College Ave
Bloomington, IL 61704-2101
Phone: (309) 664-3422
Show map & directions

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

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence 85001294 (IL)

Record details

NPI number1245338896
Entity typeIndividual (Type 1)
GenderMale
Credentials PA
Sole proprietorNo
NPI enumeratedSeptember 20, 2006
Last updated in NPPESNovember 19, 2007
Mailing address602 W University Ave, Urbana, IL 61801-2530

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 1999 (27 years in practice)
Group practice Osf Multi-Specialty Group — 2128 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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