MARY MARGARET ONEILL CFNP
NPI 1841374261
Nurse Practitioner in Adelphi, MD

Active since October 24, 2006
1801 METZEROTT ROAD, ADELPHI, MD 20783(301) 434-0500(301) 434-1962 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Mary Margaret Oneill Cfnp NPPES

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

MARY MARGARET ONEILL CFNP (NPI 1841374261) is an individual nurse practitioner in Adelphi, Maryland, licensed in Maryland (AC000300) and active in the NPI registry since October 2006.

NPPES Registry Identity

NPI1841374261
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameMARY MARGARET ONEILLCredential: CFNP
Location Address1801 METZEROTT ROADAdelphi, MD 20783
Mailing Address2603 N Winchester StreetArlington, VA 22213 · (703) 536-7702
Fax(301) 434-1962
Sole ProprietorNo
Enumeration DateOctober 24, 2006
Last NPPES UpdateJuly 8, 2007
NPI 1841374261 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
Licenses Licensed in MD · AC000300 Licensed in VA · 0024129639
Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

1801 METZEROTT ROAD, Adelphi, MD 20783

Other Names 1

Former Name (1)Mary Margaret Nahan

Other Identifiers 3

Medicare UPINP49423
OtherP00297838Rr Medicare
Medicare ID-Type Unspecified019181H48VA

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 Oneill's NPI number?

The NPI number for Mary Oneill is 1841374261. It was assigned to this individual provider in the NPPES registry on October 24, 2006. The provider is also known as Mary Margaret Nahan.

Where is Mary Oneill located?

Mary Oneill practices at 1801 Metzerott Road, Adelphi, MD 20783. The listed phone number is (301) 434-0500.

What is Mary Oneill's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

When was this NPI record last updated?

The NPPES record for Mary Oneill was last updated on July 8, 2007. NPI Profile syncs with the weekly NPPES data releases published by CMS.