Nathan Ionascu, M.D.
NPI 1265762934 · Pediatrics Physician · Chappaqua, NY
Nathan Ionascu, M.D. is a Pediatrics Physician provider in Chappaqua, NY (NPI 1265762934).
Provider details
- NPI number
- 1265762934
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 102272-1 (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
16 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
- 2009-12-31
- Last updated
- 2009-12-31
Frequently asked questions
- What is Nathan Ionascu's NPI number?
- Nathan Ionascu's National Provider Identifier (NPI) is 1265762934, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Ionascu's specialty?
- Nathan Ionascu is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Ionascu located?
- Nathan Ionascu's practice location on file with NPPES is 149 Ridgewood Ter, Chappaqua, NY 10514-3550.
- What is Nathan Ionascu's phone number?
- The practice phone number listed in the NPPES registry for Nathan Ionascu is (914) 238-4877.
- Is Nathan Ionascu's NPI active?
- Yes — Nathan Ionascu's NPI (1265762934) is active in the NPPES registry as of the last update on 2009-12-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.