ICD-10-CM > D50-D89 > D80-D89 > D89 > D89.8 D89.8 Other specified disorders involving the immune mechanism, not elsewhere classified Non-Billable/Non-Specific Codes D89.81Graft-versus-host diseaseD89.810Acute graft-versus-host diseaseD89.811Chronic graft-versus-host diseaseD89.812Acute on chronic graft-versus-host diseaseD89.813Graft-versus-host disease, unspecifiedD89.82Autoimmune lymphoproliferative syndrome [ALPS]D89.83Cytokine release syndromeD89.831Cytokine release syndrome, grade 1D89.832Cytokine release syndrome, grade 2D89.833Cytokine release syndrome, grade 3D89.834Cytokine release syndrome, grade 4D89.835Cytokine release syndrome, grade 5D89.839Cytokine release syndrome, grade unspecifiedD89.84IgG4-related diseaseD89.89Other specified disorders involving the immune mechanism, not elsewhere classified