Ian Leibowitz, M.D.
NPI 1225004815 · Pediatric Gastroenterology Physician · Washington, DC
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ian Leibowitz, M.D. is a Pediatric Gastroenterology Physician provider in Washington, DC (NPI 1225004815).
Provider details
- NPI number
- 1225004815
- Entity type
- Individual
- Primary specialty
- Pediatric Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0101036573 (VA)
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
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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
Additional practice locations (2)
- 3023 Hamaker Ct Fl 6Fairfax, VA 22031-2207Phone: (703) 876-2788
- 3022 Williams DrSuite 301Fairfax, VA 22031-4600Phone: (703) 698-8960Fax: (703) 641-8427
Registry dates
- Enumerated
- 2006-02-24
- Last updated
- 2019-02-05
Frequently asked questions
- What is Ian Leibowitz's NPI number?
- Ian Leibowitz's National Provider Identifier (NPI) is 1225004815, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ian Leibowitz's specialty?
- Ian Leibowitz is listed in the NPPES registry with a primary specialty of Pediatric Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Ian Leibowitz located?
- Ian Leibowitz's practice location on file with NPPES is 111 Michigan Ave Nw, Washington, DC 20010.
- What is Ian Leibowitz's phone number?
- The practice phone number listed in the NPPES registry for Ian Leibowitz is (202) 476-5000.
- Does Ian Leibowitz accept Medicare?
- Ian Leibowitz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ian Leibowitz's NPI active?
- Yes — Ian Leibowitz's NPI (1225004815) is active in the NPPES registry as of the last update on 2019-02-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.