D89.4Mast cell activation syndrome and related disorders

ICD-10-CM category (non-billable header) code — part of Certain disorders involving the immune mechanism (D80-D89)

Code Details

Billable	No — use a more specific child code
Chapter	Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
Section	Certain disorders involving the immune mechanism (D80-D89)
Parent code	D89 — Oth disorders involving the immune mechanism, NEC

aggressive systemic mastocytosis (C96.21)
congenital cutaneous mastocytosis (Q82.2)
(non-congenital) cutaneous mastocytosis (D47.01)
(indolent) systemic mastocytosis (D47.02)
malignant mast cell neoplasm (C96.2-)
malignant mastocytoma (C96.29)
mast cell leukemia (C94.3-)
mast cell sarcoma (C96.22)
mastocytoma NOS (D47.09)
other mast cell neoplasms of uncertain behavior (D47.09)
systemic mastocytosis associated with a clonal hematologic non-mast cell lineage disease (SM-AHNMD) (D47.02)

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