Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mrs. Mary Elizabeth O'Brien, CRNP

Individual provider Primary Care Nurse Practitioner · NPI 1578554887

Mrs. Mary Elizabeth O'Brien, CRNP is a Primary Care Nurse Practitioner in Laurel, Maryland. Licensed in Maryland. Registered with an NPI since 2005.

Licensed in
MD
In the registry since
2005
What do these letters mean?
CRNP — Certified Registered Nurse Practitioner
The title Pennsylvania and some other states use for a nurse practitioner.

See every abbreviation used in this directory →

Practice location Address checks out

13952 Baltimore Ave
Laurel, MD 20707-5000
Phone: (301) 490-1990
Fax: (301) 490-8750
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Primary Care Nurse Practitioner (primary) Taxonomy 363LP2300X · Licence R073974 (MD)

Record details

NPI number1578554887
Entity typeIndividual (Type 1)
GenderFemale
Credentials CRNP
Sole proprietorNo
NPI enumeratedNovember 4, 2005
Last updated in NPPESJuly 6, 2013

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