Katherine Hajjar, M.D.
NPI 1740377837 · Pediatric Hematology & Oncology Physician · New York, NY
Katherine Hajjar, M.D. is a Pediatric Hematology & Oncology Physician provider in New York, NY (NPI 1740377837).
Provider details
- NPI number
- 1740377837
- Entity type
- Individual
- Primary specialty
- Pediatric Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 157869 (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
19 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
- 2006-10-09
- Last updated
- 2008-08-05
Frequently asked questions
- What is Katherine Hajjar's NPI number?
- Katherine Hajjar's National Provider Identifier (NPI) is 1740377837, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Hajjar's specialty?
- Katherine Hajjar is listed in the NPPES registry with a primary specialty of Pediatric Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Hajjar located?
- Katherine Hajjar's practice location on file with NPPES is 1300 York Avenue, New York, NY 10065-4805.
- What is Katherine Hajjar's phone number?
- The practice phone number listed in the NPPES registry for Katherine Hajjar is (212) 746-2034.
- Is Katherine Hajjar's NPI active?
- Yes — Katherine Hajjar's NPI (1740377837) is active in the NPPES registry as of the last update on 2008-08-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.