Lumbosacral Plexopathy after hip surgery

My friend fall and hurt the hip and back( fractures). After that she had hip / pelvic surgery. Now her entire left leg can’t lift up(thigh, knee and foot) - left leg has the sensations but just not lift. She want to know which doctor is best in this area and any one who had the same experience or professional in this area are all welcomed.

Thank you very much.