C84.9A
BillableMature T/NK-cell lymphomas, 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 or natural killer cells that is currently in remission, meaning the cancer is not actively growing or has responded to treatment.
Coding Tips
- •The '9A' suffix specifically indicates remission status; only use when documentation confirms remission
- •This code should replace the active cancer code once remission is documented
Clinical Significance
Mature T/NK-cell lymphomas, unspecified, in remission indicates a patient with an unclassified T/NK-cell lymphoma who has achieved disease control. Even in remission, the underlying cancer diagnosis persists for risk adjustment purposes because these patients require ongoing surveillance. The unspecified subtype in the historical record does not change the remission coding approach.
Documentation Requirements
- ✓Original pathology confirming mature T-cell or NK-cell lymphoma
- ✓Oncologist documentation explicitly stating remission
- ✓Most recent imaging confirming no active disease
- ✓Surveillance plan
- ✓Treatment history
Commonly Confused Codes
C84.90 — Mature T/NK-cell lymphoma, unspecified (active): Active disease, not remissionC84.4A — PTCL-NOS, in remission: Specific subtype in remissionC84.6A/C84.7B — ALCL in remission: Specific subtype in remissionZ85.79 — Personal history of malignant neoplasm of lymphoid tissue: History code for resolved cancer no longer under surveillance
Code Hierarchy
└C84Mature T/NK-cell lymphomas└C84.9Mature T/NK-cell lymphomas, unspecified└C84.9AMature T/NK-cell lymphomas, unspecified, in remission
└C84.9AMature T/NK-cell lymphomas, unspecified, in remission