C84.0A
BillableMycosis fungoides, in remission
HCC Category Mapping
V28HCC 20 — Lung and Other Severe Cancers
0.000V24HCC 10 — Lymphoma and Other Cancers
0.675ESRDHCC 10 — Lymphoma and Other Cancers
0.000RxHCCHCC 19 — Lymphoma and Other Cancers
0.000What This Code Means
Mycosis fungoides is a type of blood cancer that affects T-cells and typically starts as skin lesions. This code indicates the patient has been treated and the disease is currently in remission, meaning there are no signs of active cancer.
Coding Tips
- •Ensure documentation clearly states the patient is in remission; do not use this code if there is active disease or recurrence
- •The 'A' extension indicates the specific site or stage; verify the appropriate extension matches the clinical documentation for accurate coding
Clinical Significance
Mycosis fungoides in remission indicates the patient's cutaneous T-cell lymphoma has responded to treatment and is no longer clinically active. Patients require ongoing dermatologic and oncologic surveillance due to the chronic relapsing nature of mycosis fungoides. This code captures the continued monitoring needs and potential for recurrence that characterize this chronic malignancy.
Documentation Requirements
- ✓Explicit provider documentation of remission or complete response
- ✓Clear skin examination documenting resolution of lesions
- ✓History of confirmed mycosis fungoides diagnosis
- ✓Ongoing surveillance plan with skin checks and laboratory monitoring
- ✓Date of remission and any maintenance therapy
Commonly Confused Codes
C84.00-C84.09 — Active mycosis fungoides by site: Use only when disease is activeZ85.79 — Personal history of lymphoid malignancies: Use only when the disease is considered permanently resolved with no ongoing surveillance; mycosis fungoides is typically chronic and recurrent, making this code rarely appropriateC84.1A — Sezary disease, in remission: Distinct diagnosis; verify the correct cutaneous T-cell lymphoma subtype
Code Hierarchy
└C84Mature T/NK-cell lymphomas└C84.0Mycosis fungoides└C84.0AMycosis fungoides, in remission
└C84.0AMycosis fungoides, in remission