C84
C84: Mature T/NK-cell lymphomas
Non-billable headerICD-10-CM
C84 is a non-billable header ICD-10-CM code for mature t/nk-cell lymphomas. 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.
- personal history of non-Hodgkin lymphoma (Z85.72)
Other codes that can never be billed with C84
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead C84
8 child codes. Green means billable.
- C84.0Mycosis fungoides
- C84.1Sezary disease
- C84.4Peripheral T-cell lymphoma, not elsewhere classified
- C84.6Anaplastic large cell lymphoma, ALK-positive
- C84.7Anaplastic large cell lymphoma, ALK-negative
- C84.ACutaneous T-cell lymphoma, unspecified
- C84.ZOther mature T/NK-cell lymphomas
- C84.9Mature T/NK-cell lymphomas, unspecified