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MR. WILLIAM J AFFELDT MSSW LICSW
NPI 1013950203
Social Worker - Clinical in Walker, MN

Active since June 14, 2006PECOS Enrolled
310 RAILROAD AVE, WALKER, MN 56484(218) 675-9170(320) 639-0014 Get Directions Write a Review

NPPES record last updated: January 27, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jan 27, 2026, May 12, 2022, Feb 25, 2021 (3 updates tracked since 2021).

About Mr. William J Affeldt Mssw Licsw NPPES

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

MR. WILLIAM J AFFELDT MSSW LICSW (NPI 1013950203) is an individual clinical provider in Walker, Minnesota, licensed in Minnesota (4248) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1986).

NPPES Registry Identity

NPI1013950203
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameMR. WILLIAM J AFFELDTCredential: MSSW LICSW
Location Address310 RAILROAD AVEWalker, MN 56484
Mailing Address310 Railroad AveWalker, MN 56484 · (218) 675-9170 · Fax (320) 639-0014
Phone(218) 675-9170
Fax(320) 639-0014
Sole ProprietorNo
Medical School CMSOtherGraduated 1986
Enumeration DateJune 14, 2006
Last NPPES UpdateJanuary 27, 20263 updates tracked since enumeration
NPPES CertifiedJanuary 27, 2026
✔ NPI 1013950203 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in MN · 4248
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
Also ListedSocial WorkerTaxonomy 104100000X · License 4248 (MN)
310 RAILROAD AVE, Walker, MN 56484
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Other Identifiers 5

Other110573C851Ucare
Other6248959Medica
Medicaid970757300MN
OtherHP27808Health Partners
Other922241007835Preferred One

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include HealthPartners, Sanford Health Plan.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)

Mr. William J Affeldt Mssw Licsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID4587856968
PECOS Enrollment IDI20101004000692
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.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychotherapy, 1 hour 90837
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 1-hour session, you'll talk about your feelings, thoughts, and behaviors to help identify and manage mental health issues. This process aids in personal growth, healing, and improved well-being.
81 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 56484 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
$0.00 typical visit price
range $56.00 – $168.28
Typical copayment $0.00 (range $14.00 – $42.07)
Most-billed visit code NA
Established Patient
$69.74 typical visit price
range $18.32 – $138.04
Typical copayment $17.43 (range $4.58 – $34.51)
Most-billed visit code 99213
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

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

CYNTHIA ANN ROLLO-CARLSON LICSW, LCSW,LADC
Social Worker (Clinical)
310 RAILROAD AVE
WALKER, MN 56484
Cass County (218) 675-9170

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 Affeldt's NPI number?

The NPI number for William Affeldt is 1013950203. It was assigned to this individual provider in the NPPES registry on June 14, 2006.

Where is William Affeldt located?

William Affeldt practices at 310 Railroad Ave, Walker, MN 56484. The listed phone number is (218) 675-9170.

What is William Affeldt's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is William Affeldt enrolled in Medicare?

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

What insurance does William Affeldt accept?

Health plans from HealthPartners and Sanford Health Plan list William Affeldt 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 Affeldt was last updated on January 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.