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Mark Czaja, MD
NPI 1265522163 · Gastroenterology Physician · Bronx, NY
Mark Czaja, MD is a Gastroenterology Physician provider in Bronx, NY (NPI 1265522163).
Provider details
- NPI number
- 1265522163
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 154435 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
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
Montefiore Medical Park
1515 Blondell Avenue, Ste. 220
Bronx, NY 10461
Phone: (866) 633-8255
Approximate (ZIP-level) locationGet directions
Mailing address
10 Smith Pl
Williston Park, NY 11596-1143
Registry dates
- Enumerated
- 2006-10-13
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Czaja's NPI number?
- Mark Czaja's National Provider Identifier (NPI) is 1265522163, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Czaja's specialty?
- Mark Czaja is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Czaja located?
- Mark Czaja's practice location on file with NPPES is Montefiore Medical Park, Bronx, NY 10461.
- What is Mark Czaja's phone number?
- The practice phone number listed in the NPPES registry for Mark Czaja is (866) 633-8255.
- Is Mark Czaja's NPI active?
- Yes — Mark Czaja's NPI (1265522163) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.