Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Mary E Marshall, OT

Occupational Therapist in Greeley, CO · enumerated 2007.

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

National Provider Identifier

1528186806

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Registry record

Entity type Individual (Type 1)

Name Ms. Mary E Marshall

Credential OT

Sex Female

Practice address 5881 W 16th St, Greeley, CO, 80634

Phone (970) 313-2775

Fax (970) 350-2777

Enumeration date Mar 26, 2007

Last updated in NPPES Jan 10, 2012

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 239129 (CO) Primary

OT · Occupational Therapist: A licensed therapist helping patients develop or recover skills for daily living and working. About the OT credential

Other identifiers

Identifier	Type	State	Issuer
51558271	Medicaid	CO	-
P00944887	Other	CO	MEDICARE RAILROAD CARRIER PTAN

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 Mary Marshall?

Mary Marshall is registered in NPPES with the primary taxonomy of 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.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-10.