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Joanne Berthelsen Lcsw LLC

Clinical Social Worker in Oconomowoc, WI · enumerated 2020 · authorized official Joanne Berthelsen, Owner/Provider.

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

National Provider Identifier

1124657721

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Registry record

Entity type Organization (Type 2)
Legal business name Joanne Berthelsen Lcsw LLC
Practice address 830 Armour Rd Ste 2, Oconomowoc, WI, 53066
Phone (262) 235-2350
Fax (235) 804-8132
Enumeration date Apr 6, 2020
Last updated in NPPES Apr 6, 2020

Taxonomy & classification

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers Secondary
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers Primary

Authorized official

Name Joanne Berthelsen
Title Owner/Provider
Phone (262) 235-2350

Other identifiers

Identifier Type State Issuer
100071305 Medicaid WI -

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.

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Frequently asked questions

What type of organization is Joanne Berthelsen Lcsw LLC?
Joanne Berthelsen Lcsw LLC is registered in NPPES as a Clinical Social Worker (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-04-06.