Workers’ compensation — Medical treatment — Reimbursement — Jurisdiction — Action arising out of employer’s deauthorization of physician, who had previously been treating claimant, on the basis of physician’s new practice charging fees in excess of statutory rates and requiring fees to be paid in advance — Judge of compensation claims had no authority to order employer to pay claimant’s physician for services in excess of statutory rates as all reimbursement disputes fall under the exclusive jurisdiction of the Department of Financial Services — Even if JCC could resolve payment disputes, it could not compel prepayment, which chapter 440 does not contemplate for medical treatment — Deauthorization — Portion of JCC’s order requiring physician’s continued authorization is affirmed where JCC’s conclusions that claimant had established a satisfactory patient-physician relationship with physician and that employer had not established a valid reason for deauthorization were supported by competent, substantial evidence — While authorization allows physician to demand compensation if he chooses to treat claimant, employer cannot be forced to prepay above-scheduled rates