279.5 Graft-versus-host disease
Code first underlying cause, such as:
complication of transplanted organ (bone marrow) (996.80-996.89)
complication of blood transfusion (999.8)
Use additional code to identify associated manifestations, such as:
desquamative dermatitis (695.89)
diarrhea (787.91)
elevated bilirubin (782.4)
hair loss (704.09)