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

Dena Witkin, MSDE

Q: What is the NPI number for Dena Witkin?

The National Provider Identifier (NPI) for Dena Witkin is 1639424039, a Type 1 (individual) record in the CMS NPPES registry.

Specialist in Bayside, NY · enumerated 2012.

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

National Provider Identifier

1639424039

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Registry record

Entity type Individual (Type 1)

Name Dena Witkin

Credential MSDE

Sex Female

Practice address Bayside, NY, 11361

Phone (516) 680-7596

Enumeration date Jul 23, 2012

Last updated in NPPES Jul 23, 2012

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

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 876625 (NY) 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 Dena Witkin practice?

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

What is the NPI number for Dena Witkin?

The National Provider Identifier (NPI) for Dena Witkin is 1639424039, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-23.