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

Martha Cowan, OTRL

Q: What is the NPI number for Martha Cowan?

The National Provider Identifier (NPI) for Martha Cowan is 1598858771, a Type 1 (individual) record in the CMS NPPES registry.

Occupational Therapist in Freeport, IL · enumerated 2006.

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

National Provider Identifier

1598858771

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Registry record

Entity type Individual (Type 1)

Name Martha Cowan

Credential OTRL

Sex Female

Practice address Freeport, IL, 61032

Phone (815) 541-7740

Fax (815) 232-8763

Enumeration date Oct 2, 2006

Last updated in NPPES Feb 3, 2015

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

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 056000666 (IL) 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

Where does Martha Cowan practice?

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

What is the NPI number for Martha Cowan?

The National Provider Identifier (NPI) for Martha Cowan is 1598858771, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-02-03.