C86.6Primary cutaneous CD30-positive T-cell proliferations

C86.6 is the ICD-10-CM diagnosis code for primary cutaneous CD30-positive T-cell proliferations. It belongs to category C86 (other specified types of T/NK-cell lymphoma), block C81-C96 (malignant neoplasms of lymphoid, hematopoietic and related tissue) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within C86 (other specified types of T/NK-cell lymphoma), C86.6 is specifically for primary cutaneous CD30-positive T-cell proliferations. Related codes cover extranodal NK/T-cell lymphoma, nasal type (C86.0), Hepatosplenic T-cell lymphoma (C86.1), Enteropathy-type (intestinal) T-cell lymphoma (C86.2), subcutaneous panniculitis-like T-cell lymphoma (C86.3), Blastic NK-cell lymphoma (C86.4) and Angioimmunoblastic T-cell lymphoma (C86.5).

To report this condition, pick the subcode that matches the documentation: C86.60 (not having achieved remission) and C86.61 (in remission).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2025 (expanded into subcodes).

Before ICD-10, this condition was coded in ICD-9-CM as 200.80 (other named variants of lymphosarcoma and reticulosarcoma, unspecified site, extranodal and solid organ sites).