Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Madison Isaak

Physical Therapist in Tarrytown, NY · enumerated 2026.

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

National Provider Identifier

1851224083

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Registry record

Entity type Individual (Type 1)

Name Madison Isaak

Sex Female

Practice address 155 White Plains Rd, Tarrytown, NY, 10591

Phone (914) 366-0500

Enumeration date Jun 6, 2026

Last updated in NPPES Jun 6, 2026

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers 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.

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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 Madison Isaak?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-06.