What should I do about my mothers kindle? (it's broken at a doctors office)?

Okay so at the doctors office my mother laid her kindle down on the table, and the nurse that works there went to hang a light scope on the hanger well she didn't hang it right and it immediately fell and messed up my mothers screen on her kindle. The doctor said that he wasn't liable for it yet, he don't have any Signs up saying he is not liable for damaged property. Help please?