ICD-10-CM
ICD-10 code for Disease, diseased systemic tissue mast cell: D47.02
The ICD-10-CM index points "Disease, diseased systemic tissue mast cell" to D47.02, Systemic mastocytosis. D47.02 is a billable code.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
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