Psychiatrist | 46+ years experience

Dr. Dennis Arthur O'brien, M.D.

223 Medical Center Dr, Riverdale, Georgia, 30274-2640

About Dr. Dennis Arthur O'brien

Dr. Dennis Arthur O'brien is a psychiatrist based in Riverdale, Georgia with 46 years of experience in Psychiatry. He completed his graduation from Temple University School Of Medicine in 1980. He accepts the Medicare-approved amount. Patients will not be billed for any more than the Medicare deductible and coinsurance. Active license number of Dr. Dennis Arthur O'brien is C161834 for Psychiatry in California. His current practice location is 223 Medical Center Dr, Riverdale. Patients can contact him at 770-991-8500. Dr. Dennis Arthur O'brien, M.D., specializes in Psychiatry and his NPI number (Unique professional ID assigned by NPPES) is 1043250079.

Dr. Dennis Arthur O'brien specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Practice Information

Dr. Dennis Arthur O'brien's specialty, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Dr. Dennis Arthur O'brien
Specialization Psychiatry
Credentials M.D.
Accepts Medicare Assignment Yes
Experience 46+ years
Medical School Attended Temple University School Of Medicine
Graduation Year 1980
Gender Male
Practice Address: 223 Medical Center Dr,
Riverdale, GA - 30274-2640

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to healthcare providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

PAC ID 9537124177
Enrollment ID I20200206002195
NPI Number1043250079
NPI Enumeration Date: 07 Jun, 2006
NPI Last Update On: 08 Jun, 2026

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialties in the same state or different states. Related medical licenses for Dr. Dennis Arthur O'brien are as mentioned below.

License NumberSpecializationStateStatus
C161834Psychiatry CaliforniaPrimary
025893Psychiatry GeorgiaSecondary

Group Practice

Group practices are practice of medicine by a group of healthcare professionals who share their premises and other resources. Following list states all the group name with which Dr. Dennis Arthur O'brien is associated with along with the number of members in that group.
Organization Name (Group PAC ID) Members
County Of Alameda (9739070624)22

Other Medical Identifiers

Other professional identifiers associated with Dr. Dennis Arthur O'brien such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
000483348AMedicaidGeorgia

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Dr. Dennis Arthur O'brien
5325 Broder Blvd,
Dublin, CA - 94568-3309

Book an Appointment with Dr. Dennis Arthur O'brien

To schedule an appointment, contact Dr. Dennis Arthur O'brien at 223 Medical Center Dr, Riverdale, Georgia or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Dennis Arthur O'brien:

Dr. Dennis Arthur O'brien is a psychiatrist specializing in Psychiatry. He specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Dr. Dennis Arthur O'brien completed his education (M.D.) from Temple University School Of Medicine in 1980.

Dr. Dennis Arthur O'brien has approximately 46 years of experience in Psychiatry.

Yes, Dr. Dennis Arthur O'brien accepts Medicare assignment, meaning the provider participates in Medicare and accepts Medicare-approved amounts for eligible services.

Yes, Dr. Dennis Arthur O'brien is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.
*Availability may change. Please contact the office directly to ask about appointments.

Dr. Dennis Arthur O'brien practices at 223 Medical Center Dr, Riverdale, Georgia, 30274-2640.

To schedule an appointment with Dr. Dennis Arthur O'brien, please contact the office at 770-991-8500.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.