Alejandra Maria O'Brien

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

036.139005 Issued in IL

Practice address

1740 W Taylor St
Chicago, IL 60612-7232

Phone

(866) 600-2273

NPI assigned

Mar 26, 2013

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other names 1

• Alejandra Maria Laverne Former name

Medicare fee-for-service enrollment

Enrolled in IN

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

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: aobrien1158623@direct.trinity-health.org

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.

• Cep America LLC

  • Emergency Medicine Physician
  • Terre Haute, IN
  • NPI 1285103671
  Medicare reassignment NPD
• Elite Emergency Physicians Inc

  • Emergency Medicine Physician
  • Elkhart, IN
  • NPI 1932155371
  Medicare reassignment NPD
• Cep America LLC

  • Emergency Medicine Physician
  • Fort Lauderdale, FL
  • NPI 1700747946
  NPD

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

{
    "created_epoch": "1364256000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1743120000000",
    "number": "1619219805",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "910 W MADISON ST APT 509",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606072959",
            "telephone_number": "574-274-0405"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1740 W TAYLOR ST",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606127232",
            "telephone_number": "866-600-2273"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "ALEJANDRA",
        "middle_name": "MARIA",
        "name_prefix": "Dr.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2013-03-26",
        "last_updated": "2025-03-28",
        "certification_date": "2025-03-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "IN",
            "license": "01081747A",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "IL",
            "license": "036.139005",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "ALEJANDRA",
            "last_name": "LAVERNE",
            "middle_name": "MARIA",
            "credential": "MD",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Karen O' Connor Perla, M.D.
• Linda Curtis O'Bannon, MD
• Bridget E O'Brien Fagan, NP
• O'Brien Therapy Inc.
• Amelia O'Brien-Combs, MPH, RDN
• Anne O'Brien, MA/CCC-SLP
• Bridget L O'Brien, DPT
• Cathleen J O'Brien I, LPC
• Colleen O'Brien, LCPC
• Daniel Thomas O'Brien, DO

• Emergency Medicine Physician in Chicago, IL
• Providers in Chicago, IL by specialty
• Emergency Medicine Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 28, 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.