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STEPHEN K WILLIAMSON M.D.
NPI 1598859183
Internal Medicine - Medical Oncology in Westwood, KS

Active since October 03, 2006PECOS Enrolled
2330 SHAWNEE MISSION PKWY, WESTWOOD, KS 66205(913) 588-7750(913) 588-8766 Get Directions Write a Review

NPPES record last updated: May 12, 2014. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Stephen K Williamson M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

STEPHEN K WILLIAMSON M.D. (NPI 1598859183) is an individual medical oncology provider in Westwood, Kansas, licensed in Kansas (04-19904) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1598859183
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameSTEPHEN K WILLIAMSONCredential: M.D.
Location Address2330 SHAWNEE MISSION PKWYWestwood, KS 66205-2005
Mailing Address2330 Shawnee Mission Pkwy, Suite 210, Ms 5003Westwood, KS 66205-2005 · (913) 588-6029 · Fax (913) 588-4085
Phone(913) 588-7750
Fax(913) 588-8766
Sole ProprietorNo
Enumeration DateOctober 3, 2006
Last NPPES UpdateMay 12, 2014
✔ NPI 1598859183 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License✔ Licensed in KS · 04-19904
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
2330 SHAWNEE MISSION PKWY, Westwood, KS 66205
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Other Identifiers 7

Medicaid202035515MO
Medicaid100203590AKS
Other627430KS · Firstguard
Other12507045MO · Bcbs Kc
Medicare ID-Type Unspecified110121125KS · Railroad Medicare
Medicare ID-Type Unspecified0115183AKS
Medicare UPINC51771

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Stephen K Williamson M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 66205 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$161.67 typical visit price
range $53.00 – $161.67
Typical copayment $40.41 (range $13.25 – $40.41)
Most-billed visit code 99205
Established Patient
$94.12 typical visit price
range $16.88 – $132.11
Typical copayment $23.53 (range $4.22 – $33.02)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

QAMAR J KHAN M.D.
Internal Medicine (Hematology & Oncology)
2330 SHAWNEE MISSION PKWY, SUITE 210, MAIL STOP 5003
WESTWOOD, KS 66205
Johnson County (913) 588-6029
DEBORAH M. HALL M.D.
Internal Medicine
2330 SHAWNEE MISSION PKWY, SUITE 2201
WESTWOOD, KS 66205
Johnson County (913) 588-9800
DR. MARK REDICK MD
Radiology (Diagnostic Radiology)
2330 SHAWNEE MISSION PKWY
WESTWOOD, KS 66205
Johnson County (913) 588-6805
JUDITH M ROLING APN
Nurse Practitioner (Family)
2330 SHAWNEE MISSION PKWY, SUITE 2201
WESTWOOD, KS 66205
Johnson County (913) 588-9800
ALLYSA JONES PA-C
Physician Assistant
2330 SHAWNEE MISSION PKWY
WESTWOOD, KS 66205
Johnson County (913) 588-7550
DR. ANURAG K SINGH M.D.
Internal Medicine (Hematology & Oncology)
2330 SHAWNEE MISSION PKWY, SUITE 210
WESTWOOD, KS 66205
Johnson County (913) 588-6030
MISS MARGARET ANNE FOSS APRN
Nurse Practitioner (Adult Health)
2330 SHAWNEE MISSION PKWY
WESTWOOD, KS 66205
Johnson County (913) 945-9549
KATHRYN LISTON
Clinical Nurse Specialist (Oncology)
2330 SHAWNEE MISSION PKWY
WESTWOOD, KS 66205
Johnson County (913) 588-1227

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Stephen Williamson's NPI number?

The NPI number for Stephen Williamson is 1598859183. It was assigned to this individual provider in the NPPES registry on October 3, 2006.

Where is Stephen Williamson located?

Stephen Williamson practices at 2330 Shawnee Mission Pkwy, Westwood, KS 66205. The listed phone number is (913) 588-7750.

What is Stephen Williamson's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Stephen Williamson enrolled in Medicare?

Yes. Stephen Williamson is registered in the Medicare PECOS enrollment system.

What insurance does Stephen Williamson accept?

Health plans from Oscar Insurance Company list Stephen Williamson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Stephen Williamson was last updated on May 12, 2014. NPI Profile syncs with the weekly NPPES data releases published by CMS.