C84.AA
BillableCutaneous T-cell lymphoma, unspecified, 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 21 — Hodgkin Lymphoma and Other Cancers
0.000What This Code Means
A type of blood cancer affecting T-cells in the skin that is currently in remission (no active disease).
Coding Tips
- •Only assign this code when documentation explicitly states the patient is in remission or complete response
- •This code should not be used if there is any evidence of active disease or recurrence
Clinical Significance
Cutaneous T-cell lymphoma in remission remains a significant diagnosis for risk adjustment because it reflects an ongoing cancer history requiring surveillance. Even in remission, patients need regular dermatologic monitoring, blood work, and imaging to detect recurrence. Accurate coding of remission status distinguishes active disease burden from controlled disease.
Documentation Requirements
- ✓Provider must explicitly state 'in remission' or 'complete response' — absence of treatment alone is insufficient
- ✓Document date remission was achieved and method of confirmation (clinical exam, imaging, biopsy)
- ✓Specify original cutaneous T-cell lymphoma subtype if known (mycosis fungoides, Sezary syndrome, etc.)
- ✓Note ongoing surveillance plan and any maintenance therapy
Commonly Confused Codes
C84.A0 (Cutaneous T-cell lymphoma, unspecified site) — Use C84.AA only when remission is documented; C84.A0 is for active disease with unspecified siteZ85.79 (Personal history of other malignant neoplasms of lymphoid, hematopoietic tissue) — History codes are used when cancer is completely resolved and no longer under treatment; remission codes indicate cancer still requiring monitoringC84.10 (Sezary disease, unspecified site) — If the specific CTCL subtype is documented, use the subtype-specific code rather than unspecified
Code Hierarchy
└C84Mature T/NK-cell lymphomas└C84.ACutaneous T-cell lymphoma, unspecified└C84.AACutaneous T-cell lymphoma, unspecified, in remission
└C84.AACutaneous T-cell lymphoma, unspecified, in remission