| D89 | Other disorders involving the immune mechanism, not elsewhere classified |
| | Polyclonal hypergammaglobulinemia |
| | Cryoglobulinemia |
| | Hypergammaglobulinemia, unspecified |
| | Immune reconstitution syndrome |
| | Mast cell activation syndrome and related disorders |
| | Mast cell activation, unspecified |
| | Monoclonal mast cell activation syndrome |
| | Idiopathic mast cell activation syndrome |
| | Secondary mast cell activation |
| | Hereditary alpha tryptasemia |
| | Other mast cell activation disorder |
| | Other specified disorders involving the immune mechanism, not elsewhere classified |
| | Graft-versus-host disease |
| | Acute graft-versus-host disease |
| | Chronic graft-versus-host disease |
| | Acute on chronic graft-versus-host disease |
| | Graft-versus-host disease, unspecified |
| | Autoimmune lymphoproliferative syndrome [ALPS] |
| | Cytokine release syndrome |
| | Cytokine release syndrome, grade 1 |
| | Cytokine release syndrome, grade 2 |
| | Cytokine release syndrome, grade 3 |
| | Cytokine release syndrome, grade 4 |
| | Cytokine release syndrome, grade 5 |
| | Cytokine release syndrome, grade unspecified |
| | Other specified disorders involving the immune mechanism, not elsewhere classified |
| | Disorder involving the immune mechanism, unspecified |
