Accredited, Evidence-based Care Beginnings Treatment Centers offers innovative, research-backed substance abuse treatment in Costa Mesa, California, led by a skilled team. Fully accredited by The Joint Commission, they deliver exceptional care for addiction and co-occurring issues like anxiety, depression, and PTSD. Executives & Professionals For professionals facing addiction, Beginnings provides tailored inpatient and outpatient support, addressing unique challenges like financial management and career reintegration. Coastal Environment With over 46 years of service, the Residential Treatment Center in picturesque Costa Mesa is close to beautiful beaches. Clients enjoy private rooms and a welcoming atmosphere.