Jessica O'Brien, P.A.-C.

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

C0008241 Issued in MD

Practice address

5100 Eastern Ave
Baltimore, MD 21224-2772

Phone

(410) 814-4500

NPI assigned

Dec 17, 2014

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 8

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in DC, MD2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 2

Specialty

Physician Assistant

Education

Other, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Patient First Maryland Medical Group PLLCGroup PAC ID 4385538735, shared by 26 NPIs, 258 clinicians

Sridhar Chatrathi MD PCGroup PAC ID 2961594742, 4 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jessica.obrien@166622370791428.direct.elationemr.com

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Sridhar Chatrathi MD PC

  • Cardiovascular Disease Physician
  • Greenbelt, MD
  • NPI 1699987172

  DC

  Medicare reassignment Care Compare group
• Patient First Maryland Medical Group PLLC

  • Family Medicine Physician
  • Silver Spring, MD
  • NPI 1265866503

  DC

  Medicare reassignment NPD
• Patient First Maryland Medical Group, PLLC

  • Family Medicine Physician
  • Glen Allen, VA
  • NPI 1962423632

  MD

  Medicare reassignment NPD
• Patient First Maryland Medical Group PLLC

  • Family Medicine Physician
  • Waldorf, MD
  • NPI 1205087517
  NPD
• Patient First Maryland Medical Group PLLC

  • Family Medicine Physician
  • Capitol Heights, MD
  • NPI 1427807999
  NPD
• Frederick Health Hospital Inc

  dba Frederick Health Hospital

  • General Acute Care Hospital
  • Frederick, MD
  • NPI 1538165527
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1418774400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765152000000",
    "number": "1902204340",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5100 EASTERN AVE",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212242772",
            "telephone_number": "410-814-4500",
            "fax_number": "410-400-8600"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5100 EASTERN AVE",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212242772",
            "telephone_number": "410-814-4500"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "JESSICA",
        "credential": "P.A.-C.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2014-12-17",
        "last_updated": "2025-12-08",
        "certification_date": "2025-12-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "AZ",
            "license": "7734",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "NC",
            "license": "0010-12772",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "MD",
            "license": "C0008241",
            "primary": true
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "DC",
            "license": "PA031097",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "PA52917",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "SC",
            "license": "PA3404",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "VA",
            "license": "0110-008469",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "MO",
            "license": "2022042041",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "MDExchange@patientfirst.com",
            "affiliation": "N",
            "endpointDescription": "email",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "address_1": "5100 Eastern Ave",
            "city": "Baltimore",
            "state": "MD",
            "country_code": "US",
            "postal_code": "212242772",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Ainsley Anthony O Garro, P.A.
• Caitlin O'Brien, M.D.
• Danielle R O'Brien, PA-C
• Heather O'Brien
• Jennifer O'Brien
• Jessica Woodward O'Brien, PHD
• John Joseph O'Brien, MSW
• Katherine Louise O'Brien, M.D.
• Lindsay Cedolin O'Brien, MS CCC-SLP
• Maureen Elizabeth O'Brien, LCPC

• Physician Assistant in Baltimore, MD
• Providers in Baltimore, MD by specialty
• Physician Assistant in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 8, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.