Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ann Marie Mestres, LMSW

Q: What is the NPI number for Ann Mestres?

The National Provider Identifier (NPI) for Ann Mestres is 1629819438, a Type 1 (individual) record in the CMS NPPES registry.

Social Worker in Hillsboro, MO · enumerated 2024.

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

National Provider Identifier

1629819438

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Registry record

Entity type Individual (Type 1)

Name Ann Marie Mestres

Credential LMSW

Sex Female

Practice address 102 4th St, Hillsboro, MO, 63050

Phone (618) 877-4420

Enumeration date Jun 5, 2024

Last updated in NPPES Jun 5, 2024

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 2024019202 (MO) Primary

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 Ann Mestres?

The National Provider Identifier (NPI) for Ann Mestres is 1629819438, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ann Mestres practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-05.