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

Mary B Mattis, LCSW, LCDC

Q: What is the NPI number for Mary Mattis?

The National Provider Identifier (NPI) for Mary Mattis is 1548481195, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Social Worker in Austin, TX · enumerated 2007.

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

National Provider Identifier

1548481195

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Registry record

Entity type Individual (Type 1)

Name Mary B Mattis

Credential LCSW, LCDC

Sex Female

Practice address Austin, TX, 78745

Phone (512) 701-7378

Enumeration date May 1, 2007

Last updated in NPPES Mar 30, 2013

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 53118 (TX) Primary

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 12038 (TX) Secondary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

Other identifiers

Identifier	Type	State	Issuer
12020270	Other	TX	CAHQ
210099201	Medicaid	TX	-

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 Mary Mattis practice?

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

What is the NPI number for Mary Mattis?

The National Provider Identifier (NPI) for Mary Mattis is 1548481195, 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 2013-03-30.