Richard E O'Brien, P.A.

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

PA02952 Issued in TX

Practice address

4900 Mueller Blvd
Austin, TX 78723-3051

Phone

(512) 777-2917

NPI assigned

Aug 12, 2009

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in TX

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 1

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: richard.obrienpa.p105@direct.mednax.nextgenshare.com
• Direct secure messaging: richard.o.brien.1@8363.direct.athenahealth.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.

• Dell Children'S Medical Group

  • Pediatrics Physician
  • Austin, TX
  • NPI 1326072943
  Medicare reassignment NPD
• Magella Medical Associates Billing, Inc.

  • Neonatal-Perinatal Medicine Physician
  • Round Rock, TX
  • NPI 1083631071
  Medicare reassignment
• Dell Children'S Medical Group

  • Pediatrics Physician
  • Round Rock, TX
  • NPI 1790103869
  NPD

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

{
    "created_epoch": "1250035200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767657600000",
    "number": "1740412642",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4900 MUELLER BLVD",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787233051",
            "telephone_number": "512-777-2917"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4900 MUELLER BLVD",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787233051",
            "telephone_number": "512-777-2917"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "RICHARD",
        "middle_name": "E",
        "credential": "P.A.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2009-08-12",
        "last_updated": "2026-01-06",
        "certification_date": "2026-01-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "TX",
            "license": "PA02952",
            "primary": true
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Barbara A O'Brien, M.A.
• Juliana Helen O'Brien, LCSW
• Marcia Lea O'Brien, MSN, APRN, NP-C
• Marian 'Micki' D. O'Brien, M.ED.,, L.P.C.
• Owen M. O'Brien, LMSW
• Seth D. O'Brien, M.D.
• Ana O'Connell
• Cory Ann O'Connell, AGCNS-BC
• Deborah M. O'Connell, MD
• David Edward O'Connor, MD

• Physician Assistant in Austin, TX
• Providers in Austin, TX by specialty
• Physician Assistant in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 6, 2026; 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.