When a claim has been closed by the department or self-insurer by written order and notice for 60 days, submission of a formal "application to reopen claim due to worsening of condition" form # F242-079-000 is preferred. The department or self-insurer is responsible for customary charges for examinations, diagnostic studies, and determining whether or not time-loss is payable regardless of the final action taken on the reopening application. Reopening applications should be submitted immediately. When reopening is granted, the department or self-insurer can pay time loss and treatment benefits only for a period not to exceed 60 days prior to date the application is received by the department or self-insurer. The 60 days may be extended up to 120 days consistent with RCW 51.28.040. Necessary treatment should not be deferred pending a department or self-insurer adjudication decision. However, should reopening be denied treatment costs become the financial responsibility of the worker.