Marian Fleischer, M.D.
NPI 1861671653 · Colon & Rectal Surgery Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Colorectal Surgery (proctology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marian Fleischer, M.D. is a Colon & Rectal Surgery Physician provider in Brooklyn, NY (NPI 1861671653).
Provider details
- NPI number
- 1861671653
- Entity type
- Individual
- Primary specialty
- Colon & Rectal Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 137530 (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
18 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
- 2007-10-29
- Last updated
- 2014-04-29
Frequently asked questions
- What is Marian Fleischer's NPI number?
- Marian Fleischer's National Provider Identifier (NPI) is 1861671653, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marian Fleischer's specialty?
- Marian Fleischer is listed in the NPPES registry with a primary specialty of Colon & Rectal Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Marian Fleischer located?
- Marian Fleischer's practice location on file with NPPES is 9707 Fourth Avenue, Brooklyn, NY 11209.
- What is Marian Fleischer's phone number?
- The practice phone number listed in the NPPES registry for Marian Fleischer is (914) 963-1400.
- Does Marian Fleischer accept Medicare?
- Marian Fleischer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marian Fleischer's NPI active?
- Yes — Marian Fleischer's NPI (1861671653) is active in the NPPES registry as of the last update on 2014-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.