Stonewall Institute-Phoenix. Cocaine addiction is costly. Drug rehab doesn’t have to be. Stonewall Institute is an affordable addiction treatment provider in Phoenix, Arizona. Set in an upscale environment, this Intensive Outpatient Program is discreet and does not interfere with your job or other life commitments. It meets 3 times a week in the evenings for group sessions for 8 weeks. Our drug treatment counselors are highly trained and motivated to help you get sober and stay sober. Look for us on Yelp and read what our clients say about us. Then check our website at www.stonewallinstitute.com or call us at 602-535-6468. Our addiction treatment counselors are available to talk to you now.