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MRS. KAREN LOUISE O'BRIEN ANP
NPI 1265872048
Nurse Practitioner - Adult Health in Roslyn, NY

Active since June 26, 2013
100 PORT WASHINGTON BLVD, ROSLYN, NY 11576(516) 562-6000 Get Directions Write a Review

NPPES record last updated: June 26, 2013. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mrs. Karen Louise O'brien Anp NPPES

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

MRS. KAREN LOUISE O'BRIEN ANP (NPI 1265872048) is an individual adult health provider in Roslyn, New York, licensed in New York (F305840) and active in the NPI registry since June 2013.

NPPES Registry Identity

NPI1265872048
Entity TypeIndividualFemale
Primary Taxonomy363LA2200X
Provider Legal NameMRS. KAREN LOUISE O'BRIENCredential: ANP
Location Address100 PORT WASHINGTON BLVDRoslyn, NY 11576-1347
Mailing Address219 Bedell TerWest Hempstead, NY 11552-2444 · (516) 489-5499
Phone(516) 562-6000
Sole ProprietorYes
Enumeration DateJune 26, 2013
✔ NPI 1265872048 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 · F305840
100 PORT WASHINGTON BLVD, Roslyn, NY 11576
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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.

ERIN MARIE MARKEY R.N.,M.S.,APRN-BC
Nurse Practitioner (Acute Care)
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 562-6351
DR. MENA YACOUB D.O
Internal Medicine (Clinical Cardiac Electrophysiology)
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (718) 689-0316
JULIA COHEN
Physician Assistant
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 562-6000
PEDIATRIC CARDIOLOGY OF LI PC
Pediatrics (Pediatric Cardiology)
100 PORT WASHINGTON BLVD, SUITE 108
ROSLYN, NY 11576
Nassau County (516) 365-3340
PATRICK BRENNAN P.A.
Physician Assistant
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 338-5358
KENNETH ZIELINSKI P.A.
Physician Assistant
100 PORT WASHINGTON BLVD
ROSLYN, NY 11576
Nassau County (516) 338-5358
DR. STEFAN MILTON MUEHLBAUER M.D., PHD
Emergency Medicine
100 PORT WASHINGTON BLVD, DEPT OF EMERGENCY MEDICINE
ROSLYN, NY 11576
Nassau County (165) 626-6055
MRS. MELISSA A MORELLI FNP-C
Nurse Practitioner (Family)
100 PORT WASHINGTON BLVD, ST. FRANCIS HOSPITAL EMERGENCY ROOM
ROSLYN, NY 11576
Nassau County (516) 562-6600

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 Karen O'brien's NPI number?

The NPI number for Karen O'brien is 1265872048. It was assigned to this individual provider in the NPPES registry on June 26, 2013.

Where is Karen O'brien located?

Karen O'brien practices at 100 Port Washington Blvd, Roslyn, NY 11576. The listed phone number is (516) 562-6000.

What is Karen 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 Karen O'brien was last updated on June 26, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.