Is C84.0 a billable code?
No. C84.0 is a header code that groups 11 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
C84.0: Mycosis fungoides
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
C84.0 groups related diagnoses under mycosis fungoides. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under C84.0
- 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
Other codes in C84 Mature T/NK-cell lymphomas
- C84.1Sezary diseaseheader
- C84.4Peripheral T-cell lymphoma, not elsewhere classifiedheader
- C84.6Anaplastic large cell lymphoma, ALK-positiveheader
- C84.7Anaplastic large cell lymphoma, ALK-negativeheader
- C84.9Mature T/NK-cell lymphomas, unspecifiedheader
- C84.ACutaneous T-cell lymphoma, unspecifiedheader
- C84.ZOther mature T/NK-cell lymphomasheader
C84.0 questions
What does C84.0 mean?
C84.0 is the ICD-10-CM code for Mycosis fungoides. It is in chapter 2, Neoplasms (C00-D49).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.