Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Van Demark, SLP

Speech-Language Pathologist in Saugerties, NY · enumerated 2008.

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

National Provider Identifier

1356594733

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Registry record

Entity type Individual (Type 1)

Name Mary Van Demark

Credential SLP

Sex Female

Practice address 21 Spada Dr, Saugerties, NY, 12477

Phone (845) 247-0668

Fax (845) 246-3710

Enumeration date Oct 29, 2008

Last updated in NPPES Oct 29, 2008

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 004379 (NY) Primary

SLP · Speech-Language Pathologist: A licensed clinician treating speech, language, and swallowing disorders. About the SLP 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1356594733 active?

Yes, as of the latest NPPES snapshot, NPI 1356594733 is active (record last updated 2008-10-29).

How do I verify Mary Van Demark's NPI record?

Cross-check NPI 1356594733 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Kaitlyn Sinnott-Della Chiesa Speech-Language Pathologist · Saugerties, NY NPI 1316188899

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-10-29.