279: Disorders involving the immune mechanism
Use additional code for associated manifestations
279.5 Graft-versus-host disease
Code first underlying cause, such as:
complication of blood transfusion (999.89)
complication of transplanted organ (996.80-996.89)
Use additional code to identify associated manifestations, such as:
desquamative dermatitis (695.89)
diarrhea (787.91)
elevated bilirubin (782.4)
hair loss (704.09)

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