MARY CHRISTINE O'BRIEN PSYD
NPI 1649133711
Clinical Neuropsychologist in Lake Grove, NY

Q: What is Mary O'brien's NPI number?

The NPI number for Mary O'brien is 1649133711. It was assigned to this individual provider in the NPPES registry on December 5, 2025.

Q: What is Mary O'brien's specialty?

The primary specialty registered for this NPI is Clinical Neuropsychologist with taxonomy code 103G00000X.

Q: When was this NPI record last updated?

The NPPES record for Mary O'brien was last updated on December 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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.

Active since December 05, 2025PECOS Enrolled

4 SMITH HAVEN MALL, LAKE GROVE, NY 11755(631) 444-8053 Get Directions Write a Review

NPPES record last updated: December 5, 2025. Verified against the NPPES registry weekly; last sync: September 13, 2026.

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About Mary Christine O'brien Psyd NPPES

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

MARY CHRISTINE O'BRIEN PSYD (NPI 1649133711) is an individual clinical neuropsychologist in Lake Grove, New York, licensed in New York (027770) and active in the NPI registry since December 2025. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1649133711

Entity TypeIndividualFemale

Primary Taxonomy103G00000X

Provider Legal NameMARY CHRISTINE O'BRIENCredential: PSYD

Location Address4 SMITH HAVEN MALLLake Grove, NY 11755-1219

Mailing Address96 Bay RdHalesite, NY 11743-1356

Phone(631) 444-8053

Sole ProprietorNo

Enumeration DateDecember 5, 2025

NPPES CertifiedDecember 5, 2025

✔ NPI 1649133711 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinical NeuropsychologistBehavioral Health & Social Service Providers

Taxonomy Code103G00000X

License✔ Licensed in NY · 027770

Definition

A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.

4 SMITH HAVEN MALL, Lake Grove, NY 11755

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mary Christine O'brien Psyd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Other Providers at the Same Location NPPES 10

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

DR. SCOTT A STEIN D.O.

Internal Medicine