Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephen K Williamson, M.D.

Medical Oncology Physician in Westwood, KS · enumerated 2006 · practices at Jayhawk Primary Care Inc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1598859183

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Stephen K Williamson

Credential M.D.

Sex Male

Practice address 2330 Shawnee Mission Pkwy, Westwood, KS, 66205

Phone (913) 588-7750

Fax (913) 588-8766

Enumeration date Oct 3, 2006

Last updated in NPPES May 12, 2014

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 04-19904 (KS) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
12507045	Other	MO	BCBS KC
627430	Other	KS	FIRSTGUARD
100203590A	Medicaid	KS	-
202035515	Medicaid	MO	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Stephen Williamson practice?

The practice location on file with NPPES is in Westwood, KS. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Stephen Williamson?

The National Provider Identifier (NPI) for Stephen Williamson is 1598859183, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Sunil Abhyankar Hematology & Oncology Physician · Westwood, KS NPI 1972575488 Ruben Reyes Internal Medicine Physician · Westwood, KS NPI 1164496220 Mark Redick Diagnostic Radiology Physician · Westwood, KS NPI 1063489631 Mark Wetzel Internal Medicine Physician · Westwood, KS NPI 1912976523 Jennifer Heins Physician Assistant · Westwood, KS NPI 1477514164 Prakash Neupane Hematology & Oncology Physician · Westwood, KS NPI 1700822210 Rita Hyde Internal Medicine Physician · Westwood, KS NPI 1790701084 Carnie Nulton Internal Medicine Physician · Westwood, KS NPI 1699791871

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-05-12.