Is C86 a billable ICD-10-CM code?

No. C86 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C86 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96).

What cannot be coded together with C86?

C86 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

C86

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

Non-billable headerICD-10-CM

C86 is a non-billable header ICD-10-CM code for other specified types of t/nk-cell lymphoma. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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-)

Other codes that can never be billed with C86

These codes carry an Excludes1 note pointing at C86. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C86 alone.

C77Secondary and unspecified malignant neoplasm of lymph nodes
C84.7Anaplastic large cell lymphoma, ALK-negative
C84.ZOther mature T/NK-cell lymphomas
C85Other specified and unspecified types of non-Hodgkin lymphoma
D76Other specified diseases with participation of lymphoreticular and reticulohistiocytic tissue

Risk adjustment

C86 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead C86

7 child codes. Green means billable.

Questions about C86

Is C86 a billable ICD-10-CM code?: No. C86 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C86 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96).
What cannot be coded together with C86?: C86 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.