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Compassionate, Experienced, Multidisciplinary Care

Our experienced, multidisciplinary team of specialists led by Dr. Stacy Seikel, MD, provides the most comprehensive treatment program for lasting recovery.

Stacy Seikel, MD

Medical Director

Stacy Seikel, MD, is the Medical Director for Atlanta Addiction Recovery Center (AARC). Board-certified in addiction medicine and anesthesiology, Dr. Seikel is a national leader in addiction treatment, including medication-assisted treatment (MAT) for opioid addiction, and dual diagnosis treatment.

Dr. Seikel believes in being a strong patient advocate. She has worked on the state and national levels to develop programs to keep families intact while a parent achieves recovery and sobriety. She serves as a professional mentor, and is involved in state level efforts in Georgia to educate lawmakers about the disease of addiction and the need to improve access to addiction treatment for those struggling with alcoholism, drug addiction and pain medication addiction.

Daniel Lettenberger-Klein, MS, LMFT

Executive Director

Daniel Lettenberger-Klein, MS, LMFT, is Executive Director of Atlanta Addiction Recovery Center (AARC), where he oversees business operations, recovery programming and clinical processes related to patient care. Daniel received his Bachelor of Science in Psychology from Bradley University and his Master of Science in Marriage and Family Therapy from Purdue University.

Catherine Baer, MS, MS, LPC

Clinical Director

Catherine Baer, MS, MS, LPC, serves as Clinical Director of Atlanta Addiction Recovery Center (AARC). A Licensed Professional Counselor with over 20 years of experience in the addiction treatment and mental health fields, Catherine has earned a reputation for ensuring compassionate, quality care.

One of her greatest passions is working with family members, equipping loved ones to be a support system vital to a patient’s sustained recovery. Catherine earned a Master of Science in Counseling from Georgia State University and a Master of Science in Psychology from University of Georgia.

Angela Dainas, M.Ed., LMFT

Assistant Clinical Director

Angela Dainas, M.Ed., LMFT, is Assistant Clinical Director for Atlanta Addiction Recovery Center (AARC). A Licensed Marriage and Family Therapist in Georgia, she earned a Master of Education from University of Montevallo. Angela uses a motivational and strengths-centered approach to empower clients to apply skills to tackle any obstacle that may arise in their daily lives.

Ashley Buffington, LPC, MS

Lead Therapist

Ashley Buffington is a Licensed Professional Counselor in Georgia and Lead Therapist for Atlanta Addiction Recovery Center (AARC). She has counseling experience in the areas of substance abuse, anxiety disorders, depression, trauma, adjustment disorders, anger management, grief and spiritual concerns. 

Paige McBryar, MSN, RN, FNP-BC

Nurse Practitioner

Lisa “Paige” McBryar, MSN, RN, FNP-BC, is a Nurse Practitioner at Atlanta Addiction Recovery Center (AARC). Board-certified as a Family Nurse Practitioner by the American Academy of Nurse Practitioners, Paige is highly skilled in psychiatric medication management and is passionate about helping patients with substance use disorders and co-occurring psychiatric disorders. She is pursuing a post-master's, advanced practice nursing specialty certification in Psychiatric Mental Health Nursing at Georgia State University School of Nursing. A longtime member of First Baptist Church Atlanta, she volunteers at the children's church teaching worship arts and drama for elementary school kids.

Marlette Buckner, MN, RN, ACNS-BC

Nurse Manager

Marlette Buckner, MN, RN, ACNS-BC, is the Nurse Manager at Atlanta Addiction Recovery Center (AARC). She earned a bachelor’s degree in nursing and a master’s degree in adult health nursing from Emory University’s Nell Hodgson Woodruff School of Nursing. She also has bachelor’s degrees in psychology and philosophy from Emory University. Marlette has been a registered nurse for 30 years. She has worked in acute care hospitals as a staff nurse, a clinical nurse specialist, and a professional development specialist. She has also worked in long-term care as a nurse manager, as well as charge nurse in an inpatient psychiatric, drug and alcohol detox unit.

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