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MARY KERIN O'NEILL L.C.S.W.
NPI 1851493316
Social Worker - Clinical in Stony Brook, NY

Active since September 03, 2006Opted out of Medicare · through Jan 1, 2027
215 HALLOCK RD STE 6C, STONY BROOK, NY 11790(631) 751-4720 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 23, 2026.

About Mary Kerin O'neill L.c.s.w. NPPES

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

MARY KERIN O'NEILL L.C.S.W. (NPI 1851493316) is an individual clinical provider in Stony Brook, New York, licensed in New York (R026832-1) and active in the NPI registry since September 2006. She has opted out of Medicare through January 1, 2027 and remains eligible to order and refer.

NPPES Registry Identity

NPI1851493316
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMARY KERIN O'NEILLCredential: L.C.S.W.
Location Address215 HALLOCK RD STE 6CStony Brook, NY 11790-3081
Mailing Address215 Hallock Rd Ste 6cStony Brook, NY 11790-3081 · (631) 751-4720
Phone(631) 751-4720
Sole ProprietorYes
Enumeration DateSeptember 3, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1851493316 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 · R026832-1
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.
215 HALLOCK RD STE 6C, Stony Brook, NY 11790
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Other Identifiers 1

Medicare ID-Type UnspecifiedN7A391NY

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

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Opted out of Medicare

Mary Kerin O'neill L.c.s.w. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from January 1, 2019 through January 1, 2027.

Opt-Out Effective DateJanuary 1, 2019
Opt-Out In Effect ThroughJanuary 1, 2027Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11790 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.

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 Mary O'neill's NPI number?

The NPI number for Mary O'neill is 1851493316. It was assigned to this individual provider in the NPPES registry on September 3, 2006.

Where is Mary O'neill located?

Mary O'neill practices at 215 Hallock Rd Ste 6C, Stony Brook, NY 11790. The listed phone number is (631) 751-4720.

What is Mary O'neill's specialty?

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

Is Mary O'neill enrolled in Medicare?

No. Mary O'neill has opted out of Medicare through January 1, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

What insurance does Mary O'neill accept?

Health plans from Providence Health Plan list Mary O'neill 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 Mary O'neill 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.