MedMark Treatment Centers Hayward is an addiction treatment center located at 795 Fletcher Ln, Hayward, CA 94544. The center focuses on providing comprehensive care and support to individuals seeking to overcome addiction. Open Monday to Friday from 5 AM to 1 PM and Saturdays from 8 AM to 10:30 AM, they aim to foster a compassionate environment for recovery. For more information, visit their website at medmark.com or call +15106054775.