NPPES file of Aug 9, 2026

Irwin Marc Lenefsky, LCSW

Clinical Social Worker · Brooklyn, NY

Irwin Marc Lenefsky, LCSW is a clinical social worker with a practice address in Brooklyn, New York, and NPI 1811969751, issued on Feb 5, 2006. Check the license (New York R034085-1, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1811969751
Name
Irwin Marc Lenefsky
Credential
LCSW
Primary taxonomy
Clinical Social Worker 1041C0700X
License number
R034085-1 NY
Self-reported in NPPES; status is on the state search
Practice location
1049 38TH St, Brooklyn, NY 11219
Phone
(718) 877-0044
Enumerated
Feb 5, 2006
Record last updated
Sep 29, 2025
Medicare enrollment
Enrolled (PECOS I20190305002880); may accept Medicare assignment
Telehealth
Offers telehealth (CMS)
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 clinical social worker records → All 29,293 in New York → Look up another NPI →

Also registered at 1049 38TH St

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

  1. Ruth Acriche-NemesureOccupational Therapist1194970558
  2. Amy Albenda, OTR/LOccupational Therapist1023250271
  3. Aviva BarrishCase Manager/Care Coordinator1194087528
  4. Rachel BixenspanCase Manager/Care Coordinator1386289155
  5. Jemima Bracero, OTR/LPediatric Occupational Therapist1750651287
  6. Rifka BronsteinSpecialist1346785714

Verify Irwin Marc Lenefsky 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 R034085-1    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

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

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Bills Medicare through one group practice

  1. Metropolitan Community Services IncBrooklyn, NY

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Irwin Marc Lenefsky among 29,293 clinical social worker records in New York

Irwin Marc Lenefsky, 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. Its NPI, issued in 2006, is newer than 1% of them.

  • NPI issued2006 · 1% of these records are older, 83% newer
  • In a Medicare fileYes · 8% of these records are
  • In the CMS Doctors and Clinicians fileYes · 17% of these records are
  • Graduated2004 · median 2001 among the 5,004 with a school on file
  • Record last updated2025 · 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).

3,449 clinical social worker records list a practice address in Brooklyn

They are 3,449 of the 64,057 NPPES records with a practice address in Brooklyn, and 29,293 clinical social worker records in New York.

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

The 8 clinical social worker records with the nearest ZIP codes

  1. Nehemiah Ben-Zev, LCSWBrooklyn, NY 112191255412367
  2. Gila Brenner, LCSWBrooklyn, NY 112191235202581
  3. Lea Bruder, LCSWBrooklyn, NY 112191205912516
  4. Laurie Corlin, LCSWBrooklyn, NY 112191730283300
  5. George Junco, LCSWBrooklyn, NY 112191922189505
  6. Sararivka Liberman, LCSWBrooklyn, NY 112191437234549
  7. Yelena Repka, LCSWBrooklyn, NY 112191649356437
  8. Ariella Rosenthal, LMSWBrooklyn, NY 112191942388897

Common questions

What is Irwin Marc Lenefsky, LCSW's NPI number?

Irwin Marc Lenefsky, LCSW's National Provider Identifier (NPI) is 1811969751, issued on Feb 5, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Irwin Marc Lenefsky, LCSW located?

The NPPES record lists a practice address at 1049 38TH St, Brooklyn, NY, 11219. Phone: (718) 877-0044. Providers update this record themselves, so call before visiting.

How can I verify Irwin Marc Lenefsky, LCSW's license?

NPPES lists New York license number R034085-1, 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. Medicare files from data.cms.gov. 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.