Brendan O'Brien, M.D.

Primary specialty

Trauma Surgery PhysicianTaxonomy code 2086S0127X

License

T9464 Issued in TX

Practice address

3551 Roger Brooke Dr
San Antonio, TX 78234-4504

Phone

(210) 539-9582

NPI assigned

Sep 17, 2010

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in FL

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Interoperability endpoints

• Direct secure messaging: brendan.obrien@hca5.eclinicaldirectplus.com

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

{
    "created_epoch": "1284681600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765152000000",
    "number": "1598073181",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8901 WISCONSIN AVE",
            "city": "BETHESDA",
            "state": "MD",
            "postal_code": "208890004"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3551 ROGER BROOKE DR",
            "city": "SAN ANTONIO",
            "state": "TX",
            "postal_code": "782344504",
            "telephone_number": "210-539-9582"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1887 Kingsley Ave Ste 1900",
            "address_purpose": "LOCATION",
            "city": "Orange Park",
            "state": "FL",
            "postal_code": "320734451",
            "country_code": "US",
            "telephone_number": "904-276-2549",
            "fax_number": "904-276-9235",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1 Boone Rd",
            "address_purpose": "LOCATION",
            "city": "Bremerton",
            "state": "WA",
            "postal_code": "983121894",
            "country_code": "US",
            "telephone_number": "360-475-4916",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "BRENDAN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2010-09-17",
        "last_updated": "2025-12-08",
        "certification_date": "2025-12-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2086S0127X",
            "taxonomy_group": "",
            "desc": "Surgery, Trauma Surgery",
            "state": "TX",
            "license": "T9464",
            "primary": true
        },
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "VA",
            "license": "0101251259",
            "primary": false
        },
        {
            "code": "2086S0102X",
            "taxonomy_group": "",
            "desc": "Surgery, Surgical Critical Care",
            "state": "FL",
            "license": "ME146116",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ann O Connor, MD
• Evangeline O Sullivan, PHD
• Valerie Lynn O'Bar, RD
• Sara O'Brian-Molina
• April Michele O'Brien, M.S, CCC-SLP
• Heather Elizabeth O'Brien, OTR
• Melanie O'Brien
• Patricia Eldeen O'Brien
• Samantha O'Brien
• Rhonda M O'Cana, L.P.C.

• Trauma Surgery Physician in San Antonio, TX
• Providers in San Antonio, TX by specialty
• Trauma Surgery Physician in Texas

• 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.