C86 – Other specified types of T/NK-cell lymphoma

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of lymphoid, hematopoietic and related tissue

Non-billable header

ICD-10-CM code C86

Code: C86 (claims format: C86)
Description: Other specified types of T/NK-cell lymphoma
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 2. Neoplasms (C00-D49)
Block: C81-C96 Malignant neoplasms of lymphoid, hematopoietic and related tissue

Billable codes under C86

C86 is a header code and cannot be used on claims. Choose the most specific code:

C86.0 – Extranodal NK/T-cell lymphoma, nasal typeHeader (more codes below)
C86.1 – Hepatosplenic T-cell lymphomaHeader (more codes below)
C86.2 – Enteropathy-type (intestinal) T-cell lymphomaHeader (more codes below)
C86.3 – Subcutaneous panniculitis-like T-cell lymphomaHeader (more codes below)
C86.4 – Blastic NK-cell lymphomaHeader (more codes below)
C86.5 – Angioimmunoblastic T-cell lymphomaHeader (more codes below)
C86.6 – Primary cutaneous CD30-positive T-cell proliferationsHeader (more codes below)

Notes for C86

Excludes1 (not coded here):

anaplastic large cell lymphoma, ALK negative (C84.7-)
anaplastic large cell lymphoma, ALK positive (C84.6-)
mature T/NK-cell lymphomas (C84.-)
other specified types of non-Hodgkin lymphoma (C85.8-)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block C81-C96

Excludes2 (not included here):

Kaposi's sarcoma of lymph nodes (C46.3)
secondary and unspecified neoplasm of lymph nodes (C77.-)
secondary neoplasm of bone marrow (C79.52)
secondary neoplasm of spleen (C78.89)

Frequently asked questions

What is ICD-10 code C86?

C86 is the ICD-10-CM code for other specified types of T/NK-cell lymphoma, in the block C81-C96 (Malignant neoplasms of lymphoid, hematopoietic and related tissue).

Is C86 a billable code?

No. C86 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.