I only see a blog article, written by someone who claims to have a Ph.D. but I cannot find his major on the website. There are no references to source data in the blog, which raises big red warning flags to me. If he is mentioning a CDC report, but does not reference or link to it, how can anyone verify his claims? Such a blog may be entirely self-serving.
One of the subjects that we investigate at the research institution where I work is, in fact, opioid addictions. We had a summit a year ago, in which experts from across the spectrum (medical, law enforcement, emergency responders, behavioral health, etc.) gave presentations on the different aspects of opioid addiction, including how many people get hooked as a result of over prescription. I remember that it is a significant fraction of the total number of addicts, possibly as high as 4/5 of addictions. It is a real problem.
I see that you are correct about supporting data. I am going to try to contact him to see if he can provide it.