Mary Deegan Haff, D.O.
NPI 1659565919 · Pediatric Adolescent Medicine Physician · Mineola, NY
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Deegan Haff, D.O. is a Pediatric Adolescent Medicine Physician provider in Mineola, NY (NPI 1659565919).
Provider details
- NPI number
- 1659565919
- Entity type
- Individual
- Primary specialty
- Pediatric Adolescent Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 245621 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-08-30
- Last updated
- 2026-04-28
- Certified
- 2026-04-28
Frequently asked questions
- What is Mary Deegan Haff's NPI number?
- Mary Deegan Haff's National Provider Identifier (NPI) is 1659565919, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Deegan Haff's specialty?
- Mary Deegan Haff is listed in the NPPES registry with a primary specialty of Pediatric Adolescent Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Deegan Haff located?
- Mary Deegan Haff's practice location on file with NPPES is 259 1st St, Mineola, NY 11501-3957.
- What is Mary Deegan Haff's phone number?
- The practice phone number listed in the NPPES registry for Mary Deegan Haff is (516) 663-2829.
- Does Mary Deegan Haff accept Medicare?
- Mary Deegan Haff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Deegan Haff's NPI active?
- Yes — Mary Deegan Haff's NPI (1659565919) is active in the NPPES registry as of the last update on 2026-04-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.