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

Marian Grace Messer

Occupational Therapy Assistant in Homosassa, FL · enumerated 2007.

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

National Provider Identifier

1275689200

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Registry record

Entity type Individual (Type 1)

Name Marian Grace Messer

Sex Female

Practice address Homosassa, FL, 34446

Phone (352) 382-1141

Enumeration date Jan 25, 2007

Last updated in NPPES Jun 25, 2013

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

Taxonomy & licenses

224Z00000X Occupational Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License OTA 9403 (FL) Secondary

224Z00000X Occupational Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License OTA9403 (FL) 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 Marian Messer?

Marian Messer is registered in NPPES with the primary taxonomy of Occupational Therapy Assistant. 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 2013-06-25.