A lot of doctors are dismissing pain patients. Those that are being prescribed high doses of opiates are the first to go. A lot of doctors are just tired of dealing with patients that don't want to pay for the doctors services and don't want to go by the rules. It is the patients responsibility to be sure the doctor has a good current way to contact them directly.
Your doctor can't refuse you a copy of your medical records for the cost of copying them because you have an outstanding balance. I would recommend paying the doctor. If you don't he might write something in your medical records that could make other doctors not want you as a patient. You can make a complaint, but that is going to take time. You can hire an attorney, but chances are paying what you owe the doctor will be cheaper.
When a patient takes opiates, they are aware they may have problems if the medications are suddenly withdrawn. Chances are your pain contract stated that. Taking high doses makes it worse. Just because a doctor prescribes something does not mean you have to take the prescription or get it filled. A new doctor may not keep you on the same medications you have been on or at the same doses. Most doctors start patients out on the least amount of medications.
Based on what you have said, your doctor may be planning on closing his practice Nov 1, which is tomorrow. If you can't get in touch with him directly about the medical records, look up your state laws regarding how medical records are to be handled when a doctor closes their practice. A doctor can dismiss a patient and not taper them, not write them a prescription or give them a referral to another doctor.

