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

Mr. Mark William Hornyak, PTA

Q: What is the NPI number for Mark Hornyak?

The National Provider Identifier (NPI) for Mark Hornyak is 1598960411, a Type 1 (individual) record in the CMS NPPES registry.

Physical Therapy Assistant in Wallingford, CT · enumerated 2007.

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

National Provider Identifier

1598960411

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Registry record

Entity type Individual (Type 1)

Name Mr. Mark William Hornyak

Credential PTA

Sex Male

Practice address Wallingford, CT, 06492

Phone (203) 679-5407

Fax (203) 679-6142

Enumeration date Jun 20, 2007

Last updated in NPPES Sep 25, 2008

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

Taxonomy & licenses

225200000X Physical Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 000259 (CT) 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 Mark Hornyak practice?

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

What is the NPI number for Mark Hornyak?

The National Provider Identifier (NPI) for Mark Hornyak is 1598960411, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-09-25.