NPPES file of Aug 9, 2026

Mark Joseph Leonida, LCSW

Clinical Social Worker · New York, NY

Mark Joseph Leonida, LCSW is a clinical social worker with a practice address in New York, New York, and NPI 1275399131, issued on Feb 27, 2024. Check the license (New York 093883, as entered in NPPES) 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, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1275399131
Name
Mark Joseph Leonida
Credential
LCSW
Primary taxonomy
Clinical Social Worker 1041C0700X
License number
093883 NY
Self-reported in NPPES; status is on the state search
Practice location
40 Exchange PL Ste 510, New York, NY 10005
Phone
(212) 523-4426
Enumerated
Feb 27, 2024
Record last updated
Feb 27, 2024
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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8 nearest clinical social worker records → All 29,293 in New York → Look up another NPI →

Also registered at 40 Exchange PL Ste 510

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

  1. Michael Axelrod, LMSWSocial Worker1619857653
  2. Kirsty Carroll, LMSWMental Health Counselor1134960990
  3. Sherisha HarryRegistered Nurse1689525099
  4. Rachel Herzog, LCSWClinical Social Worker1053117275
  5. Jaycie Hu, LMHCMental Health Counselor1639943418
  6. Taylor Loomis, LCSWClinical Social Worker1770424848

Verify Mark Joseph Leonida in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich New York board licenses this profession
    Search for license 093883    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
Find the New York license search

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Mark Joseph Leonida among 29,293 clinical social worker records in New York

Mark Joseph Leonida, LCSW is one of 29,293 clinical social worker records with a practice address in New York. 8% 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 2024, is newer than 93% of them.

  • NPI issued2024 · 93% of these records are older, 4% newer
  • In a Medicare fileNo · 8% of these records are
  • In the CMS Doctors and Clinicians fileNo · 17% of these records are
  • Record last updated2024 · 65% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

6,908 clinical social worker records list a practice address in New York

They are 6,908 of the 98,468 NPPES records with a practice address in New York, and 29,293 clinical social worker records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 29,293 in New York → Every provider in New York → Clinical Social Worker nationwide →

The 8 clinical social worker records with the nearest ZIP codes

  1. Allison Abrams, LCSW-RNew York, NY 100051992021497
  2. Wandra Chenault, MSW, LCSW-RNew York, NY 100051568749901
  3. Martha Crawford, LCSWNew York, NY 100051326534991
  4. Tiffany Duong-Rodriguez, LMSWNew York, NY 100051013497643
  5. Barbara Mautner, LCSWNew York, NY 100051972704401
  6. Lauren Pesso, LCSWNew York, NY 100051659886174
  7. Rachel Rennie, LCSWNew York, NY 100051184124919
  8. Alayne Richardson, LCSWNew York, NY 100051891042313

Common questions

What is Mark Joseph Leonida, LCSW's NPI number?

Mark Joseph Leonida, LCSW's National Provider Identifier (NPI) is 1275399131, issued on Feb 27, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Mark Joseph Leonida, LCSW located?

The NPPES record lists a practice address at 40 Exchange PL Ste 510, New York, NY, 10005. Phone: (212) 523-4426. Providers update this record themselves, so call before visiting.

How can I verify Mark Joseph Leonida, LCSW's license?

NPPES lists New York license number 093883, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.

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.