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MR. WILLIAM FREDRICK WALKER LISW
NPI 1689776536
Social Worker in Des Moines, IA

Active since September 02, 2006PECOS EnrolledAccepts Medicare Assignment
2501 GRAND AVE, DES MOINES, IA 50312(515) 808-2900(515) 462-0504 Get Directions Write a Review

NPPES record last updated: October 8, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 8, 2021, Jun 9, 2020 (2 updates tracked since 2020).

About Mr. William Fredrick Walker Lisw NPPES

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

MR. WILLIAM FREDRICK WALKER LISW (NPI 1689776536) is an individual social worker in Des Moines, Iowa and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and is a graduate of Other (2004).

NPPES Registry Identity

NPI1689776536
Entity TypeIndividualMale
Primary Taxonomy104100000X
Provider Legal NameMR. WILLIAM FREDRICK WALKERCredential: LISW
Location Address2501 GRAND AVEDes Moines, IA 50312-5342
Mailing Address2501 Grand AveDes Moines, IA 50312-5342 · (515) 808-2900 · Fax (515) 462-0504
Phone(515) 808-2900
Fax(515) 462-0504
Sole ProprietorYes
Medical School CMSOtherGraduated 2004
Enumeration DateSeptember 2, 2006
Last NPPES UpdateOctober 8, 20212 updates tracked since enumeration
NPPES CertifiedOctober 8, 2021
✔ NPI 1689776536 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
Definition
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
2501 GRAND AVE, Des Moines, IA 50312
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health, Oscar Insurance Company, UnitedHealthcare 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 and accepts Medicare assignment

Mr. William Fredrick Walker Lisw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5294124558
PECOS Enrollment IDI20211109000298
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 Walker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Thriving Families Counseling Services Inc.
4.1 mi
Clinical
1741 GRAND AVE
West Des Moines, IA 50265
  • Reassigned Medicare billing, Iowa enrollment
NPI 1730560939 (515) 210-0969

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

Other Providers at the Same Location NPPES 7

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

JESSICA DOPHEIDE
Counselor (Mental Health)
2501 GRAND AVE
DES MOINES, IA 50312
Polk County (515) 808-2900
MS. ALLISON J ROBBINS LISW
Social Worker
2501 GRAND AVE
DES MOINES, IA 50312
Polk County (515) 707-8202
GRACEANNE LEA RYKEN
Counselor (Mental Health)
2501 GRAND AVE
DES MOINES, IA 50312
Polk County (515) 808-2900
MR. TYLER CHARLES JACOBS-LEWIS LMHC, LPCC, CCMHC
Counselor (Mental Health)
2501 GRAND AVE
DES MOINES, IA 50312
Polk County (515) 344-3163
ALLYSON ELLEN FARLEY MSW
Social Worker
2501 GRAND AVE
DES MOINES, IA 50312
Polk County (515) 512-9065
TURNING POINT COUNSELING DSM LLC
Clinic/Center (Adult Mental Health)
2501 GRAND AVE
DES MOINES, IA 50312
Polk County (515) 512-7174
BE JUST LOVE LLC
Counselor (Mental Health)
2501 GRAND AVE
DES MOINES, IA 50312
Polk County (515) 344-3163

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 Walker's NPI number?

The NPI number for William Walker is 1689776536. It was assigned to this individual provider in the NPPES registry on September 2, 2006.

Where is William Walker located?

William Walker practices at 2501 Grand Ave, Des Moines, IA 50312. The listed phone number is (515) 808-2900.

What is William Walker's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

Is William Walker enrolled in Medicare?

Yes. William Walker is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for William Walker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Walker reassigns Medicare benefits to Thriving Families Counseling Services Inc. (West Des Moines, IA). 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 Walker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Walker accept?

Health plans from Oscar Health, Oscar Insurance Company, UnitedHealthcare and Wellmark Health Plan of Iowa, Inc. list William Walker 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 Walker was last updated on October 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.