Deena Merzel, M.D.
NPI 1881191690 · Pediatric Gastroenterology Physician · Syosset, NY
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Deena Merzel, M.D. is a Pediatric Gastroenterology Physician provider in Syosset, NY (NPI 1881191690).
Provider details
- NPI number
- 1881191690
- Entity type
- Individual
- Primary specialty
- Pediatric Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 308687 (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
8 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)
- 111 E 210th StBronx, NY 10467-2401Phone: (718) 741-2332Fax: (718) 515-5426
- 100 Woods RdValhalla, NY 10595-1530Phone: (914) 493-7000
Registry dates
- Enumerated
- 2018-04-09
- Last updated
- 2025-07-22
- Certified
- 2025-07-22
Frequently asked questions
- What is Deena Merzel's NPI number?
- Deena Merzel's National Provider Identifier (NPI) is 1881191690, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Deena Merzel's specialty?
- Deena Merzel is listed in the NPPES registry with a primary specialty of Pediatric Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Deena Merzel located?
- Deena Merzel's practice location on file with NPPES is 575 Underhill Blvd Ste 200, Syosset, NY 11791-3416.
- What is Deena Merzel's phone number?
- The practice phone number listed in the NPPES registry for Deena Merzel is (516) 822-4404.
- Does Deena Merzel accept Medicare?
- Deena Merzel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Deena Merzel's NPI active?
- Yes — Deena Merzel's NPI (1881191690) is active in the NPPES registry as of the last update on 2025-07-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.