WILLIAM T UNSDERFER MD
NPI 1942300173
Pediatrics in Salina, KS

Q: What is William Unsderfer's NPI number?

The NPI number for William Unsderfer is 1942300173. It was assigned to this individual provider in the NPPES registry on September 25, 2006.

Q: What is William Unsderfer's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for William Unsderfer was last updated on May 25, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since September 25, 2006PECOS Enrolled

501 S SANTA FE AVE, SUITE 100, SALINA, KS 67401(785) 825-2273(785) 825-2275 Get Directions Write a Review

NPPES record last updated: May 25, 2015. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About William T Unsderfer Md NPPES

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

WILLIAM T UNSDERFER MD (NPI 1942300173) is an individual pediatrics provider in Salina, Kansas, licensed in Kansas (04-24091) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1942300173

Entity TypeIndividualMale

Primary Taxonomy208000000X

Provider Legal NameWILLIAM T UNSDERFERCredential: MD

Location Address501 S SANTA FE AVE, SUITE 100Salina, KS 67401-4189

Mailing Address501 S Santa Fe Ave, Suite 100Salina, KS 67401-4189 · (785) 452-7269 · Fax (785) 452-6008

Phone(785) 825-2273

Fax(785) 825-2275

Sole ProprietorNo

Enumeration DateSeptember 25, 2006

Last NPPES UpdateMay 25, 2015

✔ NPI 1942300173 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in KS · 04-24091

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

501 S SANTA FE AVE, Salina, KS 67401

Open in Google Maps ↗

Other Identifiers 3

Medicare UPINF68529

Medicare PIN110116028KS

Medicaid100138740BKS

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Sunflower Health Plan, Ambetter Health, Ambetter Health of Delaware and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William T Unsderfer Md 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.

Medicare Billing Reassignment

Medicare enrollment records show William Unsderfer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Salina Regional Health Center, Inc

0.1 mi

Otolaryngology

520 S SANTA FE AVE STE 200
Salina, KS 67401

Reassigned Medicare billing, Kansas enrollment
220 clinicians in this Medicare group

NPI 1306432083 (785) 823-7225

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 67401 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

$81.98 typical visit price

range $53.00 – $161.67

Typical copayment $20.49 (range $13.25 – $40.41)

Most-billed visit code 99203

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.

MS. STEPHANIE A SUTTON LPC

Counselor (Professional)

501 S SANTA FE AVE, SUITE 300
SALINA, KS 67401

Saline County (785) 452-4930

LANCE KRUEGER PA-C

Physician Assistant (Surgical)

501 S SANTA FE AVE, SUITE 200
SALINA, KS 67401

Saline County (785) 452-7562

SALINA CLINIC L.L.C.

Clinic/Center (Multi-Specialty)

501 S SANTA FE AVE, SUITE 100
SALINA, KS 67401

Saline County (785) 827-9631

MS. KYRIE GIANNE RITZDORF PA-C

Physician Assistant

501 S SANTA FE AVE, SUITE 200
SALINA, KS 67401

Saline County (785) 452-7245

SALINA CLINIC L.L.C RURAL HEALTH CLINIC

Clinic/Center (Rural Health)

501 S SANTA FE AVE, 100
SALINA, KS 67401

Saline County (785) 827-9631

MIKAELA ANN ANDERES APRN, FNP-C

Nurse Practitioner (Family)

501 S SANTA FE AVE
SALINA, KS 67401

Saline County (785) 452-7000

DR. MICHAEL K. LAWRENCE M.D.

Hospitalist

501 S SANTA FE AVE, SUITE 200
SALINA, KS 67401

Saline County (785) 452-7269

LESLY TATIANA ORTIZ PA-C

Physician Assistant

501 S SANTA FE AVE, SUITE 300
SALINA, KS 67401

Saline County (785) 823-1032

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 William Unsderfer's NPI number?

The NPI number for William Unsderfer is 1942300173. It was assigned to this individual provider in the NPPES registry on September 25, 2006.

Where is William Unsderfer located?

William Unsderfer practices at 501 S Santa Fe Ave Suite 100, Salina, KS 67401. The listed phone number is (785) 825-2273.

What is William Unsderfer's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is William Unsderfer enrolled in Medicare?

Yes. William Unsderfer is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for William Unsderfer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Unsderfer reassigns Medicare benefits to Salina Regional Health Center, Inc (Salina, KS). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Unsderfer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Unsderfer accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Sunflower Health Plan, Ambetter of Oklahoma and Blue Cross and Blue Shield of Kansas, Inc. and 1 other insurer list William Unsderfer 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 William Unsderfer was last updated on May 25, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.