What are the ICD-10-PCS procedure codes for this question?

The patient was carrying a bicycle up an outside stairway at his house when he fell from the stairway into the alley. An X-ray of the lumbosacral spine taken in the emergency department showed an L4 frac- ture, and X-ray of the upper arm revealed a nondisplaced comminuted fracture of the shaft of the right humerus. An L4-L5 bilateral posterior foraminotomy with fusion and a bone graft (obtained from the iliac crest) to the posterior column L4-L5 facet joints were performed. The fracture of the humerus was treated with application of a sling and immobilization for five days. Discharge diagnoses: (1) Fracture, L4; (2) nondisplaced fracture, humerus.