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D89Other disorders involving the immune mechanism, not elsewhere classifiedNon-Billable›D89.0Polyclonal hypergammaglobulinemiaBillable›D89.1CryoglobulinemiaBillable›D89.2Hypergammaglobulinemia, unspecifiedBillable›D89.3Immune reconstitution syndromeBillable›D89.4Mast cell activation syndrome and related disordersNon-Billable›D89.40Mast cell activation, unspecifiedBillable›D89.41Monoclonal mast cell activation syndromeBillable›D89.42Idiopathic mast cell activation syndromeBillable›D89.43Secondary mast cell activationBillable›D89.44Hereditary alpha tryptasemiaBillable›D89.49Other mast cell activation disorderBillable›D89.8Other specified disorders involving the immune mechanism, not elsewhere classifiedNon-Billable›D89.81Graft-versus-host diseaseNon-Billable›D89.810Acute graft-versus-host diseaseBillable›D89.811Chronic graft-versus-host diseaseBillable›D89.812Acute on chronic graft-versus-host diseaseBillable›D89.813Graft-versus-host disease, unspecifiedBillable›D89.82Autoimmune lymphoproliferative syndrome [ALPS]Billable›D89.83Cytokine release syndromeNon-Billable›D89.831Cytokine release syndrome, grade 1Billable›D89.832Cytokine release syndrome, grade 2Billable›D89.833Cytokine release syndrome, grade 3Billable›D89.834Cytokine release syndrome, grade 4Billable›D89.835Cytokine release syndrome, grade 5Billable›D89.839Cytokine release syndrome, grade unspecifiedBillable›D89.84IgG4-related diseaseBillable›D89.89Other specified disorders involving the immune mechanism, not elsewhere classifiedBillable›D89.9Disorder involving the immune mechanism, unspecifiedBillable›