Added to the resources page here, Chronic Pain Anonymous. New and not huge, you’re more likely to find online or phone meetings than one nearby. From the site:
How do I know if I may benefit from Chronic Pain Anonymous?
If your life is managed around your experience of pain and if you make choices in activities, careers, entertainment, or any other actions depending upon how much pain you are experiencing, than you may just be experiencing chronic pain. If you can answer the following statement with an unequivocal yes:
• I admit that I am powerless over my pain-and my life has become unmanageable.
… then you may benefit from Chronic Pain Anonymous