C83.55
BillableLymphoblastic (diffuse) lymphoma, lymph nodes of inguinal region and lower limb
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 immature lymphoid cells located in the lymph nodes of the groin and lower leg region.
Coding Tips
- •Confirm documentation specifies inguinal or lower limb lymph node involvement
- •This includes nodes in the groin, thigh, and lower extremity areas
Clinical Significance
Lymphoblastic lymphoma of inguinal and lower limb lymph nodes is rare as an isolated presentation. This site should prompt thorough staging evaluation as lymphoblastic lymphoma is typically widespread at diagnosis. Pathological confirmation is essential given the broad differential for inguinal lymphadenopathy.
Documentation Requirements
- ✓Pathology with TdT and lineage markers confirming lymphoblastic lymphoma
- ✓Documentation specifying inguinal and/or lower limb lymph node involvement
- ✓Laterality documentation
- ✓Bone marrow biopsy to exclude leukemia
- ✓Comprehensive staging including CNS evaluation
Commonly Confused Codes
C83.35 — DLBCL, inguinal/lower limb; mature vs. immature cell distinctionC83.56 — Lymphoblastic lymphoma, intrapelvic; inguinal is external, intrapelvic is internalC83.15 — Mantle cell lymphoma, inguinal/lower limb; different histological subtypeC91.00 — Acute lymphoblastic leukemia; bone marrow blasts >25% = leukemia
Code Hierarchy
└C83Non-follicular lymphoma└C83.5Lymphoblastic (diffuse) lymphoma└C83.55Lymphoblastic (diffuse) lymphoma, lymph nodes of inguinal region and lower limb
└C83.55Lymphoblastic (diffuse) lymphoma, lymph nodes of inguinal region and lower limb