Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gary C Hauser, MD

Q: What is the NPI number for Gary Hauser?

The National Provider Identifier (NPI) for Gary Hauser is 1306821699, a Type 1 (individual) record in the CMS NPPES registry.

Psychiatry Physician in Watertown, WI · enumerated 2005.

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

National Provider Identifier

1306821699

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Registry record

Entity type Individual (Type 1)

Name Gary C Hauser

Credential MD

Sex Male

Practice address 129 Hospital Dr, Watertown, WI, 53098

Phone (920) 262-4800

Fax (920) 262-4813

Enumeration date Dec 9, 2005

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 14823 (WI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
30949300	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 Gary Hauser practice?

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

What is the NPI number for Gary Hauser?

The National Provider Identifier (NPI) for Gary Hauser is 1306821699, 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 2023-03-07.