Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Marina Chang Martinez, OTR/L

Physical Rehabilitation Occupational Therapist in Grapevine, TX · enumerated 2011.

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

National Provider Identifier

1982989299

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Registry record

Entity type Individual (Type 1)

Name Mrs. Marina Chang Martinez

Credential OTR/L

Sex Female

Practice address 3601 Grapevine Mills Pkwy Apt 1916, Grapevine, TX, 76051

Phone (586) 883-0319

Enumeration date Oct 18, 2011

Last updated in NPPES Oct 18, 2011

Taxonomy & licenses

225XP0019X Physical Rehabilitation Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 114418 (TX) Secondary

225XP0019X Physical Rehabilitation Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 5201007009 (MI) 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

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.

What specialty is Marina Martinez?

Marina Martinez is registered in NPPES with the primary taxonomy of Physical Rehabilitation Occupational Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-10-18.