Dr Dennis Arthur O'brien, MD - Medicare Psychiatry & Neurology in Riverdale, GA

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Dr Dennis Arthur O'brien, MD is a medicare enrolled "Psychiatry & Neurology - Psychiatry" physician in Riverdale, Georgia. His current practice location is 223 Medical Center Dr, Riverdale, Georgia. You can reach out to his office (for appointments etc.) via phone at (770) 991-8500.

Dr Dennis Arthur O'brien is licensed to practice in California (license number C161834) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1043250079.

Contact Information

Dr Dennis Arthur O'brien, MD
223 Medical Center Dr,
Riverdale, GA 30274-2640
(770) 991-8500
Not Available

Map and Direction




Physician's Profile

Full NameDr Dennis Arthur O'brien
GenderMale
SpecialityPsychiatry & Neurology - Psychiatry
Location223 Medical Center Dr, Riverdale, Georgia
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1043250079
  • Provider Enumeration Date: 06/07/2006
  • Last Update Date: 06/08/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 9537124177
  • Enrollment ID: I20080519000491

Medical Identifiers

Medical identifiers for Dr Dennis Arthur O'brien such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1043250079NPI-NPPES
000483348AMedicaidGA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2084P0800XPsychiatry & Neurology - Psychiatry C161834 (California)Primary
2084P0800XPsychiatry & Neurology - Psychiatry 025893 (Georgia)Secondary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr Dennis Arthur O'brien allows following entities to bill medicare on his behalf.
Entity NameUhs Of Anchor L.p.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1952537920
PECOS PAC ID: 4486684784
Enrollment ID: O20050816001135
Entity NameDepartment Of Behavioral Health And Developmental Disabilities
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1902030307
PECOS PAC ID: 7416002506
Enrollment ID: O20090825000435
Entity NameAssertive Community Recovery, Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1265607683
PECOS PAC ID: 6709055817
Enrollment ID: O20140306001781
Entity NameBreakthrough Recovery Outreach Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1982909503
PECOS PAC ID: 7012139363
Enrollment ID: O20210312001617

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr Dennis Arthur O'brien is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr Dennis Arthur O'brien, MD
5325 Broder Blvd,
Dublin, CA 94568-3309

Ph: () -		Dr Dennis Arthur O'brien, MD
223 Medical Center Dr,
Riverdale, GA 30274-2640

Ph: (770) 991-8500

Reviews and Comments


Psychiatry & Neurology Doctors in Riverdale, GA

Aalok Chandora, M.D.
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 362 Upper Riverdale Rd Sw, Riverdale, GA 30274
Phone: 404-550-2179    
Dr. Deen B Chandora, M.D.
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 362 Upper Riverdale Rd Sw, Riverdale, GA 30274
Phone: 404-550-3248    Fax: 770-638-4150
Syed Sajid Hasan, MD
Psychiatry & Neurology
Medicare: May Accept Medicare Assignments
Practice Location: 203 Medical Way Ste B, Riverdale, GA 30274
Phone: 678-782-5000    Fax: 678-289-9448

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.