Where Change Begins. MedMark Treatment Centers is committed to assisting individuals with their recovery from opioid addiction with dignity and respect. Our goal is to help each patient achieve a healthier lifestyle, free from drug addiction. Our outpatient treatment programs across the country offer medication-assisted treatment services including individual substance abuse counseling to address the issues of addiction and to improve the overall quality of life for those we serve. BayMark Health Services, a company dedicated to the treatment of opiate addiction, is the parent company of MedMark Treatment Centers. BayMark operates 399 opioid addiction and dependency treatment centers in 36 states.