D89.42 Idiopathic mast cell activation syndrome
Billable / valid for submission ICD10CM Release FY2026
Version history
| Release | Valid from | Valid to | Description | Billable |
|---|---|---|---|---|
| FY2026 | 2025-10-01 | current | Idiopathic mast cell activation syndrome | yes |
Related codes in D89
- D89 Other disorders involving the immune mechanism, not elsewhere classified
- D89.0 Polyclonal hypergammaglobulinemia
- D89.1 Cryoglobulinemia
- D89.2 Hypergammaglobulinemia, unspecified
- D89.3 Immune reconstitution syndrome
- D89.4 Mast cell activation syndrome and related disorders
- D89.40 Mast cell activation, unspecified
- D89.41 Monoclonal mast cell activation syndrome
- D89.43 Secondary mast cell activation
- D89.44 Hereditary alpha tryptasemia
- D89.49 Other mast cell activation disorder
- D89.8 Other specified disorders involving the immune mechanism, not elsewhere classified
- D89.81 Graft-versus-host disease
- D89.810 Acute graft-versus-host disease
- D89.811 Chronic graft-versus-host disease
- D89.812 Acute on chronic graft-versus-host disease
- D89.813 Graft-versus-host disease, unspecified
- D89.82 Autoimmune lymphoproliferative syndrome [ALPS]
- D89.83 Cytokine release syndrome
- D89.831 Cytokine release syndrome, grade 1