C84.44
BillablePeripheral T-cell lymphoma, not elsewhere classified, lymph nodes of axilla and upper 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 armpits and upper arms.
Coding Tips
- •Verify documentation confirms axillary or upper limb lymph node involvement
- •This includes lymph nodes of the shoulder and upper extremity
Clinical Significance
Peripheral T-cell lymphoma not elsewhere classified involving axillary and upper limb lymph nodes represents an aggressive lymphoma with peripheral nodal disease. Axillary lymphadenopathy from T-cell lymphoma must be differentiated from reactive lymphadenopathy, metastatic solid tumors, and B-cell lymphomas. Accurate coding supports proper staging and prognostic stratification.
Documentation Requirements
- ✓Pathology report confirming PTCL-NOS with T-cell immunophenotype
- ✓Physical examination or imaging confirming axillary and/or upper limb lymph node enlargement
- ✓Immunohistochemistry panel excluding specific T-cell lymphoma subtypes
- ✓Ann Arbor clinical staging
- ✓Documentation of active disease status
Commonly Confused Codes
C84.64 — Anaplastic large cell lymphoma, ALK-positive, axilla/upper limb: ALCL ALK+ has specific pathologic features (hallmark cells, ALK expression) and better prognosis than PTCL-NOSC84.74 — Anaplastic large cell lymphoma, ALK-negative, axilla/upper limb: ALK-negative ALCL is a separate entity with distinct morphologyC83.34 — Diffuse large B-cell lymphoma, axilla/upper limb: B-cell lineage must be excluded; DLBCL is the most common large cell lymphoma and can mimic PTCL-NOS clinicallyC84.48 — PTCL-NOS, multiple sites: Use C84.44 only when disease is limited to axillary/upper limb nodes
Code Hierarchy
└C84Mature T/NK-cell lymphomas└C84.4Peripheral T-cell lymphoma, not elsewhere classified└C84.44Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of axilla and upper limb
└C84.44Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of axilla and upper limb