OWCP will pay providers and reimburse employees promptly for all
bills received on an approved form and in a timely manner. However, no
bill will be paid for expenses incurred if the bill is submitted more
than one year beyond the end of the calendar year in which the expense
was incurred or the service or supply was provided, or more than one
year beyond the end of the calendar year in which the claim was first
accepted as compensable by OWCP, whichever is later.