NPPES file of Aug 9, 2026

William O'Leary, LCSW

Clinical Social Worker · South Setauket, NY

William O'Leary, LCSW is a clinical social worker with a practice address in South Setauket, New York, and NPI 1649481912, issued on May 25, 2007. Check the license (New York 072250, 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
1649481912
Name
William O'Leary
Credential
LCSW
Primary taxonomy
Clinical Social Worker 1041C0700X
License number
072250 NY
Self-reported in NPPES; status is on the state search
Practice location
3771 Nesconset Hwy, South Setauket, NY 11720
Phone
(631) 921-9138
Enumerated
May 25, 2007
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20100222000315); accepts 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 3771 Nesconset Hwy

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

  1. Frank Desio, DPMPrimary Podiatric Medicine Podiatrist1093716524
  2. Alan Felice, MSW, LCSWClinical Social Worker1295923571
  3. Michael Gunning, PH.D.Clinical Psychologist1962735829
  4. Dana Mancuso, RPA-C, MFTMarriage & Family Therapist1225239668
  5. Chukwuemeka Onwuzuruigbo, M.D.Surgery Physician1760582746
  6. Anthony PerrottaDentist1093706822

Verify William O'Leary 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 072250    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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William O'Leary among 29,293 clinical social worker records in New York

William O'Leary, 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 2007, is newer than 17% of them.

  • NPI issued2007 · 17% of these records are older, 68% newer
  • In a Medicare fileNo · 8% of these records are
  • In the CMS Doctors and Clinicians fileYes · 17% of these records are
  • Graduated2013 · median 2001 among the 5,004 with a school on file
  • Record last updated2007 · 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).

15 clinical social worker records list a practice address in South Setauket

They are 15 of the 135 NPPES records with a practice address in South Setauket, 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 South Setauket → Clinical Social Worker nationwide →

The 8 clinical social worker records with the nearest ZIP codes

  1. Rebekah Ackerman, LCSWCentereach, NY 117201609930411
  2. Ilene Augenlicht, LCSWCentereach, NY 117201124177472
  3. Phyllis Calabrese, LCSWSouth Setauket, NY 117201598947426
  4. John Donoghue, LCSWSouth Setauket, NY 117201376580555
  5. Luann Esen, LCSW BCDCentereach, NY 117201114053543
  6. Alan Felice, MSW, LCSWSouth Setauket, NY 117201295923571
  7. Aracelia Jimenez-Marcano, LCSW-RCentereach, NY 117201376785162
  8. Sara Levinbook, LCSWSouth Setauket, NY 117201558413542

Common questions

What is William O'Leary, LCSW's NPI number?

William O'Leary, LCSW's National Provider Identifier (NPI) is 1649481912, issued on May 25, 2007. An NPI identifies a provider in billing; it is not a license.

Where is William O'Leary, LCSW located?

The NPPES record lists a practice address at 3771 Nesconset Hwy, South Setauket, NY, 11720. Phone: (631) 921-9138. Providers update this record themselves, so call before visiting.

How can I verify William O'Leary, LCSW's license?

NPPES lists New York license number 072250, 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.