Dennis M. O'Brien Jr., MD

Primary specialty

Pediatric Hematology & Oncology PhysicianTaxonomy code 2080P0207X

License

01063696A Issued in IN

Practice address

705 Riley Hospital Dr
Indianapolis, IN 46202-5109

Phone

(317) 944-2143

Fax

(317) 944-3107

NPI assigned

May 25, 2007

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

Electronic endpoints 4

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

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: dobrien9@direct.iuhealth.org
• Direct secure messaging: dennis.obrien@lutheranhealthnetwork.cernerdirect.com
• Direct secure messaging: dobrien10431@direct.parkviewexchange.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.

• Parkview Health System Inc

  • Family Medicine Physician
  • Fort Wayne, IN
  • NPI 1932130952
  Medicare reassignment NPD
• University Pediatric Associates, Inc.

  • Pediatrics Physician
  • Indianapolis, IN
  • NPI 1457396541
  Medicare reassignment NPD
• Iu Health Medical Group Riley Specialists, LLC

  • Pediatrics Physician
  • Indianapolis, IN
  • NPI 1699561480
  NPD (past)
• Major Hospital

  • General Acute Care Hospital
  • Shelbyville, IN
  • NPI 1174555692
  NPD (past)

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

{
    "created_epoch": "1180051200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772755200000",
    "number": "1568673903",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 719094",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606779318",
            "telephone_number": "317-777-6435",
            "fax_number": "317-777-6644"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "705 RILEY HOSPITAL DR",
            "city": "INDIANAPOLIS",
            "state": "IN",
            "postal_code": "462025109",
            "telephone_number": "317-944-2143",
            "fax_number": "317-944-3107"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "11104 Parkview Circle Dr Ste 50",
            "address_purpose": "LOCATION",
            "city": "Fort Wayne",
            "state": "IN",
            "postal_code": "468451733",
            "country_code": "US",
            "telephone_number": "260-266-5400",
            "fax_number": "260-458-8948",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "DENNIS",
        "middle_name": "M.",
        "name_suffix": "Jr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-05-25",
        "last_updated": "2026-03-06",
        "certification_date": "2026-03-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2080P0207X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Hematology-Oncology",
            "state": "IN",
            "license": "01063696A",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "200880610",
            "state": "IN"
        }
    ],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicprod-mobile.parkview.com/FHIR/api/FHIR/DSTU2/",
            "affiliation": "N",
            "address_1": "11104 Parkview Circle Dr Ste 50",
            "city": "Fort Wayne",
            "state": "IN",
            "country_code": "US",
            "postal_code": "468451733",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "DENNIS.OBRIEN@lutheranhealthnetwork.cernerdirect.com",
            "affiliation": "N",
            "endpointDescription": "AMR direct address",
            "address_1": "7950 W Jefferson Blvd",
            "address_2": "Suite 217",
            "city": "Fort Wayne",
            "state": "IN",
            "country_code": "US",
            "postal_code": "468044140",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "dobrien10431@Direct.Parkviewexchange.com",
            "affiliation": "N",
            "address_1": "11104 Parkview Circle Dr Ste 50",
            "city": "Fort Wayne",
            "state": "IN",
            "country_code": "US",
            "postal_code": "468451733",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicprod-mobile.parkview.com/FHIR/api/FHIR/R4/",
            "affiliation": "N",
            "address_1": "11104 Parkview Circle Dr Ste 50",
            "city": "Fort Wayne",
            "state": "IN",
            "country_code": "US",
            "postal_code": "468451733",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• O Health Center
• O'Brien Psychological Services, Inc.
• Allison Ann O'Brien, DO
• Andrew Ross Wickman O'Brien, MD
• Daniel O'Brien
• Elizabeth Anna Margaret O'Brien, BSN
• Kate O'Brien, PSY.D.
• Kelly Marie O'Brien, COTA
• Maryanne O'Brien, NP
• Maureen O'Brien

• Pediatric Hematology & Oncology Physician in Indianapolis, IN
• Providers in Indianapolis, IN by specialty
• Pediatric Hematology & Oncology Physician in Indiana

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