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WILLIAM O'LEARY LCSW
NPI 1649481912
Social Worker - Clinical in South Setauket, NY

Active since May 25, 2007PECOS EnrolledAccepts Medicare Assignment
3771 NESCONSET HWY, SUITE 208B, SOUTH SETAUKET, NY 11720(631) 921-9138 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About William O'leary Lcsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM O'LEARY LCSW (NPI 1649481912) is an individual clinical provider in South Setauket, New York, licensed in New York (072250) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS and is a graduate of Other (2013).

NPPES Registry Identity

NPI1649481912
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameWILLIAM O'LEARYCredential: LCSW
Location Address3771 NESCONSET HWY, SUITE 208BSouth Setauket, NY 11720-1163
Mailing Address22 Parsons DrStony Brook, NY 11790-2615
Phone(631) 921-9138
Sole ProprietorYes
Medical School CMSOtherGraduated 2013
Enumeration DateMay 25, 2007
Last NPPES UpdateJuly 8, 2007
✔ NPI 1649481912 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in NY · 072250
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
3771 NESCONSET HWY, South Setauket, NY 11720
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William O'leary Lcsw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6305980855
PECOS Enrollment IDI20100222000315
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11720 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$0.00 typical visit price
range $67.40 – $203.53
Typical copayment $0.00 (range $16.85 – $50.88)
Most-billed visit code NA
Established Patient
$83.44 typical visit price
range $21.66 – $164.45
Typical copayment $20.86 (range $5.41 – $41.11)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ANTHONY JAMES PERROTTA
Dentist
3771 NESCONSET HWY
SOUTH SETAUKET, NY 11720
Suffolk County (631) 689-6969
DR. FRANK PAUL DESIO DPM
Podiatrist (Primary Podiatric Medicine)
3771 NESCONSET HWY, SUITE 106
SOUTH SETAUKET, NY 11720
Suffolk County (631) 689-6760
MRS. LUANN MONGIELLO ESEN LCSW BCD
Social Worker (Clinical)
3771 NESCONSET HWY, SUITE 208A
CENTEREACH, NY 11720
Suffolk County (631) 428-3019
MRS. DANA JEAN MANCUSO RPA-C, MFT
Marriage & Family Therapist
3771 NESCONSET HWY, STE 214
SOUTH SETAUKET, NY 11720
Suffolk County (631) 751-1420
MS. SUSAN MARIE LAU LCAT ATR
Art Therapist
3771 NESCONSET HWY, SUITE 208 A
CENTEREACH, NY 11720
Suffolk County (631) 525-1012
MR. ALAN P FELICE MSW, LCSW
Social Worker (Clinical)
3771 NESCONSET HWY, SUITE 208A
SOUTH SETAUKET, NY 11720
Suffolk County (631) 751-7222
CHRISTINE SERRANO-O'LEARY LCSW
Social Worker (Clinical)
3771 NESCONSET HWY, SUITE 208B
S SETAUKET, NY 11720
Suffolk County (631) 921-9144
DR. RONALD ALLEN SACKS DC
Chiropractor
3771 NESCONSET HWY, STE. 210
CENTEREACH, NY 11720
Suffolk County (631) 751-7701

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William O'leary's NPI number?

The NPI number for William O'leary is 1649481912. It was assigned to this individual provider in the NPPES registry on May 25, 2007.

Where is William O'leary located?

William O'leary practices at 3771 Nesconset Hwy Suite 208B, South Setauket, NY 11720. The listed phone number is (631) 921-9138.

What is William O'leary's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is William O'leary enrolled in Medicare?

Yes. William O'leary is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does William O'leary accept?

Health plans from Providence Health Plan list William O'leary as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for William O'leary was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.