Indiana Code Title 34. Civil Law and Procedure § 34-51-2-19

Sec. 19. If a subrogation claim or other lien or claim that arose out of the payment of medical expenses or other benefits exists in respect to a claim for personal injuries or death and the claimant's recovery is diminished:

the lien or claim shall be diminished in the same proportion as the claimant's recovery is diminished. The party holding the lien or claim shall bear a pro rata share of the claimant's attorney's fees and litigation expenses.