Is C85.9 a billable ICD-10-CM code?

No. C85.9 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C85.9 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 C85.9?

C85.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above C85.9 (C85) and apply to it just the same.

C85.9

C85.9 — Non-Hodgkin lymphoma, unspecified

Non-billable headerICD-10-CM

C85.9 is a non-billable header ICD-10-CM code for non-hodgkin lymphoma, unspecified. It cannot be billed on its own: choose one of the more specific child codes below.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Lymphoma NOS
Malignant lymphoma NOS
Non-Hodgkin lymphoma NOS

Excludes1 inherited from the categories above C85.9

These are not written on C85.9, but they bind it: a note on a category applies to every code beneath it. Billing C85.9 with anything listed here is a denial.

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

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

Risk adjustment

C85.9 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 history

C85.9 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead C85.9

11 child codes. Green means billable.

Related codes at this level

Codes that share C85. If C85.9 is not quite right, the correct code is usually one of these.

Questions about C85.9

Is C85.9 a billable ICD-10-CM code?: No. C85.9 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C85.9 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 C85.9?: C85.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above C85.9 (C85) and apply to it just the same.