C84.0
C84.0: Mycosis fungoides
Non-billable headerICD-10-CM
C84.0 is a non-billable header ICD-10-CM code for mycosis fungoides. 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.
- peripheral T-cell lymphoma, not elsewhere classified (C84.4-)
Other codes that can never be billed with C84.0
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 C84.0
11 child codes. Green means billable.
- C84.00Mycosis fungoides, unspecified site
- C84.01Mycosis fungoides, lymph nodes of head, face, and neck
- C84.02Mycosis fungoides, intrathoracic lymph nodes
- C84.03Mycosis fungoides, intra-abdominal lymph nodes
- C84.04Mycosis fungoides, lymph nodes of axilla and upper limb
- C84.05Mycosis fungoides, lymph nodes of inguinal region and lower limb
- C84.06Mycosis fungoides, intrapelvic lymph nodes
- C84.07Mycosis fungoides, spleen
- C84.08Mycosis fungoides, lymph nodes of multiple sites
- C84.09Mycosis fungoides, extranodal and solid organ sites
- C84.0AMycosis fungoides, in remission