Addiction Medicine in Ashburn, VA

Board Certified

◆ Fellow, American Society of Addiction Medicine

◆ American Board of Preventive Medicine

◆ American Board of Addiction Medicine

◆ FAA Aviation Medical Examiner

◆ Certified Medical Review Officer

Meet Your Physician

Carol A. Currier, MD

Medical Director & Founder, CAS Medicine

Dr. Carol Currier brings more than five decades of medical expertise and a lifelong commitment to her patients. After training in ophthalmology and earning a Master of Public Health, she transitioned her focus to occupational and preventive medicine — ultimately founding Currier Addiction Services (CAS Medicine) in 2016 to address the growing need for evidence-based addiction care in Northern Virginia.

Dr. Currier is board-certified in both Occupational & Environmental Medicine and Addiction Medicine through the American Board of Preventive Medicine, and holds an active certification from the American Board of Addiction Medicine. She is a Fellow of the American Society of Addiction Medicine (ASAM) and a Diplomate of the American College of Preventive Medicine.

Beyond her practice, Dr. Currier has dedicated her career to serving communities in need, providing medical care in Nicaragua and Ecuador. Her approach combines rigorous clinical excellence with genuine compassion — treating every patient with the respect and dignity they deserve on their path to recovery.

Education & Training

BA — University of Wisconsin, Madison
MD (Medicine & Surgery) — MCP-Hahnemann College of Medicine, Philadelphia, PA
Ophthalmology Residency — University of Alabama, Birmingham
Master of Public Health — Medical College of Wisconsin, Milwaukee

Antonio Joyner, PMHNP-BC

Psychiatric Mental Health Nurse Practitioner

Antonio Joyner is a board-certified Psychiatric Mental Health Nurse Practitioner with over eight years of mental health nursing experience and a distinguished background as a U.S. Army veteran. He earned his Master of Science in Nursing from Shenandoah University and is licensed to practice in Virginia, Washington D.C., and Maryland.

Antonio specializes in the treatment of substance use disorders and co-occurring mental health conditions, including addiction, anxiety, depression, PTSD, ADHD, bipolar disorder, and dual diagnosis. His practice is grounded in holistic, recovery-oriented, patient-centered care — helping individuals navigate the complexities of recovery and build lasting stability.

Substance Use Disorders Dual Diagnosis PTSD & Trauma ADHD Anxiety & Depression Medication Management LGBTQ+ Affirming

MSN — JMU / Shenandoah University

Licensed: VA, DC, MD

U.S. Army Veteran

Ruth Sims

Patient Care Coordinator

Ruth Sims is the primary point of contact for patients seeking appointments with Dr. Carol Currier. As Dr. Currier's dedicated patient care coordinator, Ruth ensures every patient receives a prompt, caring response and a smooth scheduling experience from first call through confirmed appointment.

Whether you are a new patient exploring your options or an established patient scheduling a follow-up, Ruth is here to help guide you through the process and answer any scheduling or administrative questions you may have.

Appointment Scheduling Patient Coordination New Patient Intake

(571) 926-4540

casmedicine@gmail.com

Addiction Medicine

Comprehensive, evidence-based evaluation and treatment of alcohol, opioid, and other substance use disorders. We treat the whole person — not just the addiction.

Medication-Assisted Treatment (MAT)

FDA-approved medications combined with counseling and support to treat opioid and alcohol use disorders, reducing cravings and supporting long-term recovery.

Psychiatric Services

Mental health evaluation, diagnosis, and medication management for anxiety, depression, PTSD, ADHD, bipolar disorder, and co-occurring conditions with Antonio Joyner, PMHNP-BC.

Dual Diagnosis Treatment

Integrated care for patients with both substance use disorders and co-occurring mental health conditions — because treating one without the other rarely works.

Occupational & Preventive Medicine

Workplace health, DOT physical examinations, occupational injury care, and drug testing programs. We help keep workers and workplaces healthy and compliant.

FAA Aviation Medical Exams

Dr. Currier is an FAA-designated Aviation Medical Examiner (AME) providing required medical certifications for pilots and aviation personnel since 1997.

Medical Review Officer (MRO) Services

Certified Medical Review Officer services for workplace drug and alcohol testing programs, ensuring regulatory compliance and accurate interpretation of results.

Telehealth Services

Convenient virtual appointments for established and new patients in Virginia, Maryland, and Washington D.C. — bringing expert care to you wherever you are.

Insurance Accepted

Aetna Anthem Cigna UnitedHealthcare Medicaid Medicare

Office Location

20130 Lakeview Center Plaza, Suite 400
Ashburn, VA 20147

Phone

(571) 926-4540

Email

casmedicine@gmail.com

Fax

(571) 746-9040

Office Hours

Monday – Friday: 9:00 AM – 5:00 PM
Telehealth also available

Antonio Joyner, PMHNP-BC — Psychiatric Services

Free 15-minute consultation available

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Addiction Medicine in Ashburn, Virginia