Mary Elizabeth O'Brien, CRNP
Primary Care Nurse Practitioner · Laurel, MD
Mary Elizabeth O'Brien, CRNP is a primary care nurse practitioner with a practice address in Laurel, Maryland, and NPI 1578554887, issued on Nov 4, 2005. Check the license (Maryland R073974, as entered in NPPES) with the Maryland board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mary Elizabeth O'Brien
- Credential
- CRNP
- Primary taxonomy
- Primary Care Nurse Practitioner 363LP2300X
- License number
- R073974 MD
Self-reported in NPPES; status is on the state search - Practice location
- 13952 Baltimore Ave, Laurel, MD 20707
- Phone
- (301) 490-1990
- Enumerated
- Nov 4, 2005
- Record last updated
- Jul 6, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (301) 490-8750
- Medicaid ID
- 333703100 MD
- Entity
- Type 1 · individual
Also registered at 13952 Baltimore Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Ferris, DOInternal Medicine Physician1144590415
- Patrick Fong, M.D.Internal Medicine Physician1548502131
- Kirsten LandersFamily Nurse Practitioner1740969930
- Robert Maggin, MDInternal Medicine Physician1255322574
- Jenny Moy, MDInternal Medicine Physician1093706301
- Lalitha Tadikonda, MDInternal Medicine Physician1265423586
Verify Mary Elizabeth O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license R073974Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Primary Care Nurse Practitioner providers in Maryland
There are 295 primary care nurse practitioner records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
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- Boma Alamina, FNP-BCLaurel, MD1265809438
Common questions
What is Mary Elizabeth O'Brien, CRNP's NPI number?
Mary Elizabeth O'Brien, CRNP's National Provider Identifier (NPI) is 1578554887, issued on Nov 4, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mary Elizabeth O'Brien, CRNP located?
The NPPES record lists a practice address at 13952 Baltimore Ave, Laurel, MD, 20707. Phone: (301) 490-1990. Providers update this record themselves, so call before visiting.
How can I verify Mary Elizabeth O'Brien, CRNP's license?
NPPES lists Maryland license number R073974, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.