Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Thomas Mautz, PHD

Clinical Neuropsychologist in Portsmouth, NH · enumerated 2006.

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

National Provider Identifier

1841244522

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Registry record

Entity type Individual (Type 1)

Name Dr. William Thomas Mautz

Credential PHD

Sex Male

Practice address 20 Ladd St, 4th Floor, Portsmouth, NH, 03801

Phone (603) 334-3311

Fax (603) 433-6341

Enumeration date May 19, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 963 (NH) Primary

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 7826 (MA) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

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 William Mautz?

The National Provider Identifier (NPI) for William Mautz is 1841244522, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Mautz practice?

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

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