Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Marilyn Anne Leiby, PT

Physical Therapist in Bethlehem, PA · enumerated 2008.

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

National Provider Identifier

1033361597

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Registry record

Entity type Individual (Type 1)

Name Ms. Marilyn Anne Leiby

Credential PT

Sex Female

Practice address 2029 Westgate Dr, Bethlehem, PA, 18017

Phone (610) 861-0100

Enumeration date Oct 15, 2008

Last updated in NPPES Oct 15, 2008

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PT003887L (PA) Primary

PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation. About the PT credential

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.

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Frequently asked questions

Where does Marilyn Leiby practice?

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

What is the NPI number for Marilyn Leiby?

The National Provider Identifier (NPI) for Marilyn Leiby is 1033361597, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-10-15.