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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

MS. ELIZABETH W O'BRIEN NP
NPI 1184687964
Nurse Practitioner - Adult Health in Ithaca, NY

Active since April 11, 2006
201 DATES DRIVE, SUITE 206, ITHACA, NY 14850(607) 273-9111 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Ms. Elizabeth W O'brien Np NPPES

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

MS. ELIZABETH W O'BRIEN NP (NPI 1184687964) is an individual adult health provider in Ithaca, New York, licensed in New York (301110) and active in the NPI registry since April 2006.

NPPES Registry Identity

NPI1184687964
Entity TypeIndividualFemale
Primary Taxonomy363LA2200X
Provider Legal NameMS. ELIZABETH W O'BRIENCredential: NP
Location Address201 DATES DRIVE, SUITE 206Ithaca, NY 14850
Mailing Address202 Taughannock Blvd, Po Box 366Ithaca, NY 14851 · (607) 277-3257 · Fax (607) 277-4056
Phone(607) 273-9111
Sole ProprietorNo
Enumeration DateApril 11, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1184687964 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Adult HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2200X
License✔ Licensed in NY · 301110
201 DATES DRIVE, Ithaca, NY 14850
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Other Identifiers 1

Medicaid01933559NY

Other Providers at the Same Location NPPES 3

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

ROBERT A HESSON, MD
Internal Medicine (Nephrology)
201 DATES DRIVE, SUITE 206
ITHACA, NY 14850
Tompkins County (607) 273-9111
PROGRESSIVE NEUROSURGERY, PC
Neurological Surgery
201 DATES DRIVE, SUITE 101
ITHACA, NY 14850
Tompkins County (607) 269-0033
PHYSIATRY & REHABILITATION MEDICINE, PC
Physical Medicine & Rehabilitation
201 DATES DRIVE, SUITE 201
ITHACA, NY 14850
Tompkins County (607) 277-4097

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 Elizabeth O'brien's NPI number?

The NPI number for Elizabeth O'brien is 1184687964. It was assigned to this individual provider in the NPPES registry on April 11, 2006.

Where is Elizabeth O'brien located?

Elizabeth O'brien practices at 201 Dates Drive Suite 206, Ithaca, NY 14850. The listed phone number is (607) 273-9111.

What is Elizabeth O'brien's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.

When was this NPI record last updated?

The NPPES record for Elizabeth O'brien was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 days 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.