ICD-10-CM > C00-D49 > C81-C96 > C86 > C86.4 C86.4 Blastic NK-cell lymphoma Non-Billable/Non-Specific Applicable To Blastic plasmacytoid dendritic cell neoplasm (BPDCN) Codes C86.40Blastic NK-cell lymphoma not having achieved remissionC86.41Blastic NK-cell lymphoma, in remission