C96: Other and unspecified malignant neoplasms of lymphoid, hematopoietic and related tissue
C96.2: Malignant mast cell neoplasm

excludes1
indolent mastocytosis (D47.02)
mast cell leukemia (C94.30)
mastocytosis (congenital) (cutaneous) (Q82.2)
C96.20: Malignant mast cell neoplasm, unspecified
C96.21: Aggressive systemic mastocytosis
C96.22: Mast cell sarcoma
C96.29: Other malignant mast cell neoplasm

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