Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Maryjo Jo Onsager, ADVANCED PRACTICE SO

Social Worker in Mauston, WI · enumerated 2006.

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

National Provider Identifier

1104883396

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Maryjo Jo Onsager

Credential ADVANCED PRACTICE SO

Sex Female

Practice address Juneau County Dept of Human Services, 200 Hickory St, Mauston, WI, 53948

Phone (608) 847-2400

Fax (608) 847-9599

Enumeration date May 1, 2006

Last updated in NPPES Jun 29, 2018

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 1358121 (WI) Primary

Other identifiers

Identifier	Type	State	Issuer
39788400	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Maryjo Onsager?

The National Provider Identifier (NPI) for Maryjo Onsager is 1104883396, a Type 1 (individual) record in the CMS NPPES registry.

Where does Maryjo Onsager practice?

The practice location on file with NPPES is in Mauston, WI. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-06-29.