Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ruth Alice Holmquist, APSW CSAC CADCIII

Addiction (Substance Use Disorder) Counselor in Green Lake, WI · enumerated 2007.

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

National Provider Identifier

1851428528

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Registry record

Entity type Individual (Type 1)

Name Ruth Alice Holmquist

Credential APSW CSAC CADCIII

Sex Female

Practice address 571 County Rd A, Green Lake, WI, 54941

Phone (920) 294-4070

Fax (920) 294-4139

Enumeration date Feb 28, 2007

Last updated in NPPES Aug 17, 2010

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 12971 132 (WI) Primary

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 356 121 (WI) Secondary

Other identifiers

Identifier	Type	State	Issuer
40942000	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 Ruth Holmquist?

The National Provider Identifier (NPI) for Ruth Holmquist is 1851428528, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ruth Holmquist practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-08-17.