Ian Fagan, M.D.
NPI 1710203658 · Internal Medicine Physician · New York, NY
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ian Fagan, M.D. is a Internal Medicine Physician provider in New York, NY (NPI 1710203658).
Provider details
- NPI number
- 1710203658
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 262365 (NY)
Specialties & taxonomies
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
- 2010-04-16
- Last updated
- 2026-05-18
- Certified
- 2026-05-18
Frequently asked questions
- What is Ian Fagan's NPI number?
- Ian Fagan's National Provider Identifier (NPI) is 1710203658, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ian Fagan's specialty?
- Ian Fagan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ian Fagan located?
- Ian Fagan's practice location on file with NPPES is 550 1st Ave, New York, NY 10016-6402.
- What is Ian Fagan's phone number?
- The practice phone number listed in the NPPES registry for Ian Fagan is (212) 263-5506.
- Does Ian Fagan accept Medicare?
- Ian Fagan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ian Fagan's NPI active?
- Yes — Ian Fagan's NPI (1710203658) is active in the NPPES registry as of the last update on 2026-05-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.