C84.45
BillablePeripheral T-cell lymphoma, not elsewhere classified, lymph nodes of inguinal region and lower limb
HCC Category Mapping
V28HCC 19 — Lymphoma and Other Cancers
0.105V24HCC 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 T-cell lymphoma affecting the lymph nodes in the groin and lower legs.
Coding Tips
- •Confirm documentation specifies inguinal region or lower limb lymph node involvement
- •This includes lymph nodes of the hip, thigh, and lower extremity
Clinical Significance
Peripheral T-cell lymphoma not elsewhere classified involving inguinal and lower limb lymph nodes is an aggressive lymphoma affecting the groin and lower extremity nodal basins. This presentation may be associated with skin involvement on the lower extremities and must be carefully distinguished from cutaneous T-cell lymphoma subtypes. Site-specific coding reflects the distinct clinical presentation and potential complications.
Documentation Requirements
- ✓Pathology confirming PTCL-NOS with appropriate immunohistochemistry
- ✓Imaging or physical examination documenting inguinal and/or lower limb lymph node involvement
- ✓Documentation excluding other specific T-cell lymphoma subtypes
- ✓Clinical staging with notation of disease extent
- ✓Active disease status documented
Commonly Confused Codes
C84.65 — Anaplastic large cell lymphoma, ALK-positive, inguinal/lower limb: Requires ALK positivity on pathology, a distinct entity with different prognosisC84.75 — Anaplastic large cell lymphoma, ALK-negative, inguinal/lower limb: Separate morphologic entity from PTCL-NOSC84.A5 — Cutaneous T-cell lymphoma, unspecified, inguinal/lower limb: Cutaneous T-cell lymphoma is a skin-primary disease (mycosis fungoides, Sezary syndrome) distinct from nodal PTCL-NOSC84.48 — PTCL-NOS, multiple sites: Use only when disease is confined to inguinal/lower limb region
Code Hierarchy
└C84Mature T/NK-cell lymphomas└C84.4Peripheral T-cell lymphoma, not elsewhere classified└C84.45Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of inguinal region and lower limb
└C84.45Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of inguinal region and lower limb