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

John Ross Williamson, APRN, NP-C

Individual provider Nurse Practitioner · NPI 1386050441

John Ross Williamson, APRN, NP-C is a Nurse Practitioner in Cordell, Oklahoma. Qualified in 2014, 12 years ago. Practices with Clinton Hospital Authority, a 14-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
12
Licensed in
OK
In the registry since
2014
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.
NP-C — Nurse Practitioner, Certified
A nurse practitioner certified by the AANP.

See every abbreviation used in this directory →

Practice location Address checks out

1220 N Glenn English St
Cordell, OK 73632-2010
Phone: (580) 832-3339
Show map & directions

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

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 102511 (OK)

Record details

NPI number1386050441
Entity typeIndividual (Type 1)
GenderMale
Credentials APRN , NP-C
Sole proprietorNo
NPI enumeratedJuly 9, 2014
Last updated in NPPESJanuary 9, 2020
Certification dateJanuary 9, 2020
Mailing address12008 Cantle Rd, Oklahoma City, OK 73120-8028

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Clinton Hospital Authority — 14 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Cordell