Dr. John Peterson is Board Certified in both Internal Medicine and Addiction Medicine. 
He staffed a large methadone clinic in Downers Grove, Illinois for ten years. As an early adopter of buprenorphine medication assisted therapy, he has treated over eight hundred opioid disorder patients through his clinic in Champaign, Illinois. He is Medical Director of Chronic Pain Management at the Danville, Illinois Veterans Administration Hospital. He is a past president of the Illinois Society of Addiction Medicine.