DR. ANN MARGARET HAJDUK-BENNETT DO
NPI 1922104744
Pediatrics in Commack, NY
About Dr. Ann Margaret Hajduk-bennett Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANN MARGARET HAJDUK-BENNETT DO (NPI 1922104744) is an individual pediatrics provider in Commack, New York, licensed in New York (224492) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Ann Margaret Hajduk-bennett Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Ann Hajduk-bennett reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Mount Kisco, NY 10549
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Optum Medical Care PC
- 1,601 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11725 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
COMMACK, NY 11725
COMMACK, NY 11725
COMMACK, NY 11725
COMMACK, NY 11725
COMMACK, NY 11725
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Ann Hajduk-bennett's NPI number?
The NPI number for Ann Hajduk-bennett is 1922104744. It was assigned to this individual provider in the NPPES registry on September 16, 2006.
Where is Ann Hajduk-bennett located?
Ann Hajduk-bennett practices at 340 Veterans Memorial Hwy Suite 10, Commack, NY 11725. The listed phone number is (631) 864-6440.
What is Ann Hajduk-bennett's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Ann Hajduk-bennett enrolled in Medicare?
Yes. Ann Hajduk-bennett is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Ann Hajduk-bennett's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ann Hajduk-bennett reassigns Medicare benefits to Optum Medical Care, P.C. (Mount Kisco, NY). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ann Hajduk-bennett's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Ann Hajduk-bennett was last updated on June 29, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Ann Margaret Hajduk-Bennett, DO · NPI 1922104744
Pediatrics physician in Commack, New York. Individual provider, active in the CMS NPPES registry since September 16, 2006.
## Identity
- **NPI:** 1922104744 (Entity type: Individual)
- **Enumerated:** September 16, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 224492 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 340 VETERANS MEMORIAL HWY, SUITE 10, Commack, NY 11725-4300
- **Phone:** (631) 864-6440 · **Fax:** (631) 864-6445
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Optum Medical Care, P.C. (NPI 1982643003, Mount Kisco, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 29, 2011
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Source: [NPI Profile](https://npiprofile.com/npi/1922104744) · Data from the CMS NPPES public registry.