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

Dr. Ann Margaret Hajduk-Bennett, DO

Pediatrics Physician in Commack, NY · enumerated 2006 · practices at Lisa A Markowitz DDS PC.

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

National Provider Identifier

1922104744

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Ann Margaret Hajduk-Bennett

Credential DO

Sex Female

Practice address Commack, NY, 11725

Phone (631) 864-6440

Fax (631) 864-6445

Enumeration date Sep 16, 2006

Last updated in NPPES Jun 29, 2011

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

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 224492 (NY) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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

What is the NPI number for Ann Hajduk-Bennett?

The National Provider Identifier (NPI) for Ann Hajduk-Bennett is 1922104744, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ann Hajduk-Bennett practice?

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

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-06-29.