Hi & Welcome,
I have never heard of a treatment center specifically for Fentanyl. All of the centers I am familiar with or have heard of deal with drug & alcohol abuse in general. A drug is a drug is a drug is pretty much the issue. In other words, the centers deal with the disease of addiction no matter what the DOC.
Do you have insurance and are you able to take the time to go into treatment?
Any treatment center will be able to help you with fentanyl.....all the best sara