Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Diana Andrea Mesa-Horaitis, MS LMFT

Marriage & Family Therapist in Milwaukee, WI · enumerated 2006.

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

National Provider Identifier

1386684546

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Registry record

Entity type Individual (Type 1)

Name Mrs. Diana Andrea Mesa-Horaitis

Credential MS LMFT

Sex Female

Practice address 2906 S 20th St, Milwaukee, WI, 53215

Phone (414) 672-1353

Fax (414) 672-4265

Enumeration date Jun 7, 2006

Last updated in NPPES Jul 1, 2020

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 415124 (WI) Secondary

104100000X Social Worker Behavioral Health & Social Service Providers · License 415-124 (WI) Secondary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 415124 (WI) Primary

Other identifiers

Identifier	Type	State	Issuer
39615400	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

What is the NPI number for Diana Mesa-Horaitis?

The National Provider Identifier (NPI) for Diana Mesa-Horaitis is 1386684546, a Type 1 (individual) record in the CMS NPPES registry.

Where does Diana Mesa-Horaitis practice?

The practice location on file with NPPES is in Milwaukee, WI. 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 2020-07-01.