Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katherine Witkowski, TLLP

Psychologist in Alpena, MI · enumerated 2016 · practices at A1 Venture LLC.

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

National Provider Identifier

1184081093

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Registry record

Entity type Individual (Type 1)

Name Katherine Witkowski

Credential TLLP

Sex Female

Practice address 112 W Chisholm St, Alpena, MI, 49707

Phone (989) 340-1645

Enumeration date Jan 22, 2016

Last updated in NPPES Jul 1, 2020

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 6301016421 (MI) Primary

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

Where does Katherine Witkowski practice?

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

What is the NPI number for Katherine Witkowski?

The National Provider Identifier (NPI) for Katherine Witkowski is 1184081093, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Danica Dumsch Clinical Social Worker · Alpena, MI NPI 1720419252 Amanda Sola Clinical Social Worker · Alpena, MI NPI 1578987863 A1 Venture LLC Case Management Agency · Alpena, MI NPI 1679190151

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-01.