Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Jason A Witt, M.A.

Q: What is the NPI number for Jason Witt?

The National Provider Identifier (NPI) for Jason Witt is 1639258981, a Type 1 (individual) record in the CMS NPPES registry.

Mental Health Counselor in Greenfield, WI · enumerated 2006.

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

National Provider Identifier

1639258981

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Registry record

Entity type Individual (Type 1)

Name Jason A Witt

Credential M.A.

Sex Male

Practice address Greenfield, WI, 53220

Phone (414) 321-4411

Fax (414) 321-0552

Enumeration date Nov 6, 2006

Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers Primary

Other identifiers

Identifier	Type	State	Issuer
40924900	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

Where does Jason Witt practice?

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

What is the NPI number for Jason Witt?

The National Provider Identifier (NPI) for Jason Witt is 1639258981, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.