Mary Elizabeth O'Brien, CRNP
- Industry payments
- $105
- Affiliated sites
- 2
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2005
- Practice address
- 13952 Baltimore Ave, Laurel, MD 20707
- Practice phone
- Call (301) 490-1990
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Privia Medical Group - Laurel (Baltimore Ave)
Primary care practice · Laurel, Maryland
Find Mary O'Brien's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Mary Elizabeth O'Brien is a primary care nurse practitioner in Laurel, Maryland
Mary O'Brien practices at Privia Medical Group - Laurel (Baltimore Ave) in Laurel, Maryland.
Mary O'Brien's NPI, 1578554887, was assigned on November 4, 2005. Mary O'Brien holds Maryland license R073974.
- NPI
- 1578554887NPI Registry (opens in a new tab)
- NPI enumeration date
- November 4, 2005
- NPI status
- Active
- Practice phone
- (301) 490-1990
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mary Elizabeth O'Brien practices at Privia Medical Group - Laurel (Baltimore Ave) in Laurel, Maryland
Mary O'Brien's primary practice is Privia Medical Group - Laurel (Baltimore Ave), at 13952 Baltimore Ave, Laurel, MD 20707. The practice phone is (301) 490-1990.
- Privia Medical Group - Laurel (Baltimore Ave)13952 Baltimore Ave, Laurel, MD 20707Phone(301) 490-1990
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mary Elizabeth O'Brien is affiliated with 2 sites of care and 2 medical groups
Mary O'Brien's primary practice is Privia Medical Group - Laurel (Baltimore Ave) in Laurel, Maryland. The medical group on file is Privia Medical Group. Dmand AI also links Mary O'Brien to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Mary Elizabeth O'Brien's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mary O'Brien practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Privia Medical Group - Laurel (Baltimore Ave) | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Mary Elizabeth O'Brien is one of 216 primary care nurse practitioners in Maryland
Primary care is Mary O'Brien's primary specialty in the NPI Registry, under taxonomy code 363LP2300X. Mary O'Brien is licensed in Maryland.
Specialties and state licenses
- Primary care nurse practitioner, MarylandPrimary
Primary care nurse practitioners near Mary O'Brien
Counts of primary care nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Mary Elizabeth O'Brien's patients have a median age of 64
Across all payers, Dmand AI patient panel data puts Mary O'Brien's median patient age at 64, with 64% women.
Mary O'Brien's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women64%
- Men36%
Source: Dmand AI Patient Panel Data
Mary Elizabeth O'Brien received $105 in industry payments in 2025
CMS Open Payments shows 1 general payment to Mary O'Brien from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Alexion Pharmaceuticals, Inc. paid the most, $105.
Companies that paid Mary O'Brien the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Mary Elizabeth O'Brien's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Mary Elizabeth O'Brien
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mary Elizabeth O'Brien's NPI number?
Mary Elizabeth O'Brien's NPI number is 1578554887. It was assigned on November 4, 2005, and it is active in the NPI Registry.
What does Mary Elizabeth O'Brien specialize in?
Mary Elizabeth O'Brien is a primary care nurse practitioner in Laurel, Maryland. The primary specialty in the NPI Registry is Primary Care Nurse Practitioner (taxonomy code 363LP2300X).
Where does Mary Elizabeth O'Brien practice?
Mary O'Brien practices at 13952 Baltimore Ave, Laurel, MD 20707. Mary O'Brien's primary practice is Privia Medical Group - Laurel (Baltimore Ave) in Laurel, Maryland. Dmand AI also links Mary O'Brien to 1 group practice or clinic and 1 medical group.
What is Mary Elizabeth O'Brien's office phone number?
The practice phone on file for Mary O'Brien is (301) 490-1990.
What is Mary Elizabeth O'Brien's medical license number?
Mary O'Brien holds Maryland license R073974.
What medical group is Mary Elizabeth O'Brien part of?
Mary O'Brien is linked to Privia Medical Group. Dmand AI links Mary O'Brien to 1 more medical group.
Has Mary Elizabeth O'Brien received payments from drug or device companies?
CMS Open Payments shows $105 in general payments to Mary O'Brien from 1 company from 2025 to 2025. The largest total came from Alexion Pharmaceuticals, Inc.
How long has Mary Elizabeth O'Brien been practicing?
Mary O'Brien graduated from medical school in 1995, 31 years ago.
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