(b) The Office may, on its own initiative, or at the request of a responsible operator, order a change of physicians or facilities, but only where it has been determined that the change is desirable or necessary in the best interest of the miner. The miner may change physicians or facilities subject to the approval of the Office.
(c) If adequate treatment cannot be obtained in the area of the claimant's residence, the Office may authorize the use of physicians or medical facilities outside such area as well as reimbursement for travel expenses and overnight accommodations.