Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Marlene M. Mestres, OTR-L

Pediatric Occupational Therapist in Saint Louis, MO · enumerated 2007.

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

National Provider Identifier

1821212440

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Registry record

Entity type Individual (Type 1)

Name Ms. Marlene M. Mestres

Credential OTR-L

Sex Female

Practice address 801 N 11th St, Medicaid Department, Saint Louis, MO, 63101

Phone (314) 345-2535

Fax (314) 345-2653

Enumeration date Apr 13, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

225XP0200X Pediatric Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 003798 (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 specialty is Marlene Mestres?

Marlene Mestres is registered in NPPES with the primary taxonomy of Pediatric Occupational Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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