Mary Margaret Oneill
CFNP | Nurse Practitioner
1801 Metzerott Road, Adelphi
Maryland, 20783
301-434-0500
Mary Margaret Oneill is a Adelphi, Maryland based nurse practitioner. Active license number of Mary Margaret Oneill is AC000300 in Maryland. Her current practice location is 1801 Metzerott Road, Adelphi. Patients can reach her at 301-434-0500 or can fax her at 301-434-1962. Mary Margaret Oneill is CFNP and her NPI number (Unique professional ID assigned by NPPES) is 1841374261.
Mary Margaret Oneill has completed additional training beyond basic nursing education and provides primary health care services in accordance with state nurse practice laws or statutes. NPs are trained to assess patient needs, order and interpret diagnostic and laboratory tests, diagnose disease, formulate and prescribe medications and treatment plans.
Complete Profile:
Mary Margaret Oneill speciality, credentials, practice address, contact phone number and fax are as below.
Patients can call on the below given phone number for appointment.
| Name: | Mary Margaret Oneill |
| Specialization: | Nurse Practitioner (NP) |
| Gender: | Female |
| Credentials: | CFNP |
| Practice Address: | 1801 Metzerott Road, Adelphi,
Maryland, 20783 |
| Phone: | 301-434-0500 |
| Fax: | 301-434-1962 |
Professional Identification Codes:
NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS).
NPI details are as mentioned below.
| NPI Number: | 1841374261 |
| NPI Enumeration Date: | 24 Oct, 2006 |
| NPI Last Update On: | 08 Jul, 2007 |
Medical Licenses:
NPs can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Mary Margaret Oneill are as mentioned below.
| License Number | Specialization | State | Status | |
| AC000300 | | Maryland | Primary | |
| 0024129639 | Nurse Practitioner | Virginia | Secondary | |
Other Medical Identifiers:
Other legacy medical identifiers associated with Mary Margaret Oneill such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
| Identifier | Type | State | Issuer |
| P00297838 | Other | | RR MEDICARE |
Business Mailing Address:
Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.
| Address: | Mary Margaret Oneill
2603 N Winchester Street,
Arlington, Virginia |
| Zip: | 22213 |
| Phone Number: | 703-536-7702 |
Patients can reach Mary Margaret Oneill at
1801 Metzerott Road, Adelphi, Maryland or can
call to book an appointment on 301-434-0500.
Comments/ Reviews:
Patients can read all the reviews posted for Mary Margaret Oneill below. You may also share your own experience like the quality of treatment, behavior, and overall care provided by Mary Margaret Oneill. It will help others make informed decisions.
Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 08 December, 2025.