Is C85 a billable ICD-10-CM code?

No. C85 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C85 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 C85?

C85 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

C85

C85 — Other specified and unspecified types of non-Hodgkin lymphoma

Non-billable headerICD-10-CM

C85 is a non-billable header ICD-10-CM code for other specified and unspecified types of non-hodgkin 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.

other specified types of T/NK-cell lymphoma (C86.-)
personal history of non-Hodgkin lymphoma (Z85.72)

Other codes that can never be billed with C85

These codes carry an Excludes1 note pointing at C85. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C85 alone.

C83.3Diffuse large B-cell lymphoma
C83.8Other non-follicular lymphoma
C86Other specified types of T/NK-cell lymphoma
C26.1Malignant neoplasm of spleen
C88Malignant immunoproliferative diseases and certain other B-cell lymphomas

Risk adjustment

C85 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 C85

4 child codes. Green means billable.

Questions about C85

Is C85 a billable ICD-10-CM code?: No. C85 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C85 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 C85?: C85 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.