Dennis a O'Brien, MD PC

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

Legal business name

DENNIS A O'BRIEN, MD PC

Practice address

223 Medical Center Dr
Riverdale, GA 30274-2640

Phone

(770) 434-4567

NPI assigned

Oct 27, 2026

Last updated

Oct 27, 2026By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Dennis O'Brien, MDNPI 1043250079

Title

Owner

Phone

(770) 329-1478

Specialties & licenses 1

Addresses

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

• Dennis Arthur O'Brien, M.D.

  • Psychiatry Physician
  • Riverdale, GA
  • NPI 1043250079
  Authorized official Same address or phone

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

{
    "created_epoch": "1793059200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1793059200000",
    "number": "1053219386",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2563 DAYVIEW LN",
            "city": "ATLANTA",
            "state": "GA",
            "postal_code": "303319532"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "223 MEDICAL CENTER DR",
            "city": "RIVERDALE",
            "state": "GA",
            "postal_code": "302742640",
            "telephone_number": "770-434-4567"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "DENNIS A O'BRIEN, MD PC",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-10-27",
        "last_updated": "2026-10-27",
        "certification_date": "2026-10-27",
        "status": "A",
        "authorized_official_last_name": "O'BRIEN",
        "authorized_official_first_name": "DENNIS",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "770-329-1478",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• DB Chandora MDPC
• Ciara R Deaton, RN, BSN
• Cynthia C Decamp, FNP
• Tiara Delevoe, MS CCC-SLP
• Karmecia L'Aime Deloach, LPC
• Natacha Destra, LPN
• Alina Dhital
• Diagnostic Health Corporation (Tara Diagnostic Center a Healthsouth Facility)
• Diagnostics Imaging Services (Omi Diagnostics)
• Diagnostics Imaging Services (Omi Diagnostics)

• Psychiatry Physician in Riverdale, GA
• Providers in Riverdale, GA by specialty
• Psychiatry Physician in Georgia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 27, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.