DR. MARY B DEEGAN HAFF D.O.
NPI 1659565919
Pediatrics - Adolescent Medicine in Mineola, NY
About Dr. Mary B Deegan Haff D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARY B DEEGAN HAFF D.O. (NPI 1659565919) is an individual adolescent medicine provider in Mineola, New York, licensed in New York (245621-1) and active in the NPI registry since August 2007. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Mary B Deegan Haff D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mary Deegan Haff reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boynton Beach, FL 33426
- Reassigned Medicare billing, New York enrollment
- 7,712 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.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MINEOLA, NY 11501
MINEOLA, NY 11501
MINEOLA, NY 11501
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 Mary Deegan Haff's NPI number?
The NPI number for Mary Deegan Haff is 1659565919. It was assigned to this individual provider in the NPPES registry on August 30, 2007.
Where is Mary Deegan Haff located?
Mary Deegan Haff practices at 259 1st St, Mineola, NY 11501. The listed phone number is (516) 663-2829.
What is Mary Deegan Haff's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Adolescent Medicine, with taxonomy code 2080A0000X.
Is Mary Deegan Haff enrolled in Medicare?
Yes. Mary Deegan Haff is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mary Deegan Haff's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Deegan Haff reassigns Medicare benefits to New York University (Boynton Beach, FL). 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 Mary Deegan Haff'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 Mary Deegan Haff was last updated on April 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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. Mary B Deegan Haff, D.O. · NPI 1659565919
Adolescent Medicine physician in Mineola, New York. Individual provider, active in the CMS NPPES registry since August 30, 2007.
## Identity
- **NPI:** 1659565919 (Entity type: Individual)
- **Enumerated:** August 30, 2007
- **Primary specialty:** Pediatrics - Adolescent Medicine · taxonomy 2080A0000X
- **State license:** 245621-1 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 259 1ST ST, Mineola, NY 11501-3957
- **Phone:** (516) 663-2829
## 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:** New York University (NPI 1285826438, Boynton Beach, FL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 28, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1659565919) · Data from the CMS NPPES public registry.