Registry data as of Aug 27, 2026

Tirrell De Gannes, PSY.D.

Psychologist · Hicksville, NY

Tirrell De Gannes, PSY.D. is a psychologist with a practice address in Hicksville, New York, and NPI 1336794742, issued on Aug 3, 2019. Check the license with the New York board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, loaded Aug 27, 2026 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1336794742
Name
Tirrell De Gannes
Credential
PSY.D.
Primary taxonomy
Psychologist 103T00000X
Practice location
400 S Oyster Bay RD Ste 102, Hicksville, NY 11801
Phone
(516) 818-8383
Enumerated
Aug 3, 2019
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 400 S Oyster Bay RD Ste 102

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

  1. Samantha Abtey, MS, SLPSpeech-Language Pathologist1053150748
  2. Keren AlaevSpeech-Language Pathologist1184312985
  3. Brooke BaetensSpeech-Language Pathologist1790669307
  4. Allison Barry, SLPSpeech-Language Pathologist1174241681
  5. Kelly CoronadoSpeech-Language Pathologist1851086136
  6. Roseanne DalfinoSpeech-Language Pathologist1679305874

Verify Tirrell De Gannes in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich New York board licenses this professionCheck 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
Find the New York license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Psychologist providers in New York

There are 5,038 psychologist records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 5,038 in New York → Every provider in Hicksville →

Other psychologist records in New York

  1. Deena Abbe, PH.D.Smithtown, NY1730368663
  2. Korey Abbriano, PSY.D.Huntington, NY1245963321
  3. Dawn AbbuhlLatham, NY1477565109
  4. Noora Abdulkerim, PHDRochester, NY1376329904
  5. Nora Abend-Tepper, PSY.D.Woodside, NY1952717365
  6. Sandra Abitbol, PSY.D.Orangeburg, NY1588080550
  7. Joseph Abraham, PH.D.Hauppauge, NY1780673756
  8. Yaakov Abramovitz, PSYDNew York, NY1508647348
  9. Brittany AbramsWestbury, NY1164278149
  10. Matthew Abrams, PH.D.Williamsville, NY1740625805

Common questions

What is Tirrell De Gannes, PSY.D.'s NPI number?

Tirrell De Gannes, PSY.D.'s National Provider Identifier (NPI) is 1336794742, issued on Aug 3, 2019. An NPI identifies a provider in billing; it is not a license.

Where is Tirrell De Gannes, PSY.D. located?

The NPPES record lists a practice address at 400 S Oyster Bay RD Ste 102, Hicksville, NY, 11801. Phone: (516) 818-8383. Providers update this record themselves, so call before visiting.

How can I verify Tirrell De Gannes, PSY.D.'s license?

Search the New York board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.