(a) All wounds, diseases or other medical conditions accepted by OWCP in connection with a single claim are treated as the same injury for the purpose of computing any required refund and any credit against future benefits in connection with the receipt of a recovery from a third party, except that an injury caused by medical malpractice in treating an injury covered under the FECA will be treated as a separate injury for purposes of section 8132.

(b) If an injury covered under the FECA is caused under circumstances creating a legal liability in more than one person, other than the United States, to pay damages, OWCP or SOL will determine whether recoveries received from one or more third parties should be attributed to separate conditions for which compensation is payable in connection with a single FECA claim. If such an attribution is both practicable and equitable, as determined by OWCP or SOL, in its discretion, the conditions will be treated as separate injuries for purposes of calculating the refund and credit owed to the United States under section 8132.