NPPES file of Aug 9, 2026

Deena Eliana Merzel, M.D.

Pediatric Gastroenterology Physician · Syosset, NY

Deena Eliana Merzel, M.D. is a pediatric gastroenterology physician with a practice address in Syosset, New York, and NPI 1881191690, issued on Apr 9, 2018. Check the license (New York 308687, as entered in NPPES) on the NYS Education Department, Office of the Professions; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1881191690
Name
Deena Eliana Merzel
Credential
M.D.
Primary taxonomy
Pediatric Gastroenterology Physician 2080P0206X
License number
308687 NY
Self-reported in NPPES; status is on the state search
Practice location
575 Underhill Blvd Ste 200, Syosset, NY 11791
Phone
(516) 822-4404
Enumerated
Apr 9, 2018
Record last updated
Jul 22, 2025
Medicare enrollment
Enrolled (PECOS I20250814001910); may accept Medicare assignment
Medical or professional school
New York Medical College, 2018
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest pediatric gastroenterology physician records → All 182 in New York → Look up another NPI →

Also registered at 575 Underhill Blvd Ste 200

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Teresa Bianchi, D.O.Pain Medicine (Physical Medicine & Rehabilitation) Physician1841603289

Verify Deena Eliana Merzel in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
    Search for license 308687    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the New York license search

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Deena Eliana Merzel among 182 pediatric gastroenterology physician records in New York

Deena Eliana Merzel, M.D. is one of 182 pediatric gastroenterology physician records with a practice address in New York. 63% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2018, is newer than 88% of them.

  • NPI issued2018 · 88% of these records are older, 8% newer
  • In a Medicare fileNo · 63% of these records are
  • In the CMS Doctors and Clinicians fileYes · 24% of these records are
  • Graduated2018 · median 2006 among the 43 with a school on file
  • Record last updated2025 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0206X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pediatric Gastroenterology Physician providers in New York

There are 182 pediatric gastroenterology physician records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 182 in New York → Every provider in Syosset → Pediatric Gastroenterology Physician nationwide →

The 8 pediatric gastroenterology physician records with the nearest ZIP codes

  1. Jenna Berson, MDStony Brook, NY 117941871055988
  2. Anupama Chawla, M.D.Stony Brook, NY 117941134162936
  3. Ada Lee, D.O.Stony Brook, NY 117941942610282
  4. Jeffrey Morganstern, M.D.Stony Brook, NY 117941306889704
  5. Keith Breglio, M.D.Smithtown, NY 117871922277813
  6. Bradley KesslerWest Islip, NY 117951700887551
  7. Mark Lowenheim, M.D.Port Jefferson, NY 117771285676429
  8. Grace Gathungu, MDEast Setauket, NY 117331639354269

Common questions

What is Deena Eliana Merzel, M.D.'s NPI number?

Deena Eliana Merzel, M.D.'s National Provider Identifier (NPI) is 1881191690, issued on Apr 9, 2018. An NPI identifies a provider in billing; it is not a license.

Where is Deena Eliana Merzel, M.D. located?

The NPPES record lists a practice address at 575 Underhill Blvd Ste 200, Syosset, NY, 11791. Phone: (516) 822-4404. Providers update this record themselves, so call before visiting.

How can I verify Deena Eliana Merzel, M.D.'s license?

NPPES lists New York license number 308687, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.