Is C84.9 a billable ICD-10-CM code?

No. C84.9 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does C84.9 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 C84.9?

C84.9 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

C84.9

C84.9 — Mature T/NK-cell lymphomas, unspecified

Non-billable headerICD-10-CM

C84.9 is a non-billable header ICD-10-CM code for mature t/nk-cell lymphomas, unspecified. 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.

mature T-cell lymphoma, not elsewhere classified (C84.4-)

Inclusion terms

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

NK/T cell lymphoma NOS

Risk adjustment

C84.9 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 to one of these instead C84.9

11 child codes. Green means billable.

Related codes at this level

Codes that share C84. If C84.9 is not quite right, the correct code is usually one of these.

Questions about C84.9

Is C84.9 a billable ICD-10-CM code?: No. C84.9 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does C84.9 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 C84.9?: C84.9 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.