C84.94
BillableMature T/NK-cell lymphomas, unspecified, lymph nodes of axilla and upper 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 mature T-cell or natural killer cell lymphoma affecting the lymph nodes in the armpits and upper arms.
Coding Tips
- •Verify axillary and upper limb lymph node involvement is documented in clinical notes or imaging
- •Clarify if involvement is unilateral or bilateral when possible
Clinical Significance
Mature T/NK-cell lymphomas, unspecified, involving axillary and upper limb lymph nodes represents unclassified T/NK-cell lymphoma with peripheral lymphadenopathy in the armpit and upper extremity. Axillary lymphadenopathy from T-cell lymphoma must be distinguished from metastatic disease, reactive causes, and B-cell lymphomas. Further pathologic classification should be pursued.
Documentation Requirements
- ✓Pathology confirming mature T-cell or NK-cell lymphoma
- ✓Physical exam or imaging documenting axillary/upper limb lymph node involvement
- ✓Immunophenotyping results
- ✓Documentation of diagnostic efforts to classify the specific subtype
- ✓Clinical staging
Commonly Confused Codes
C84.44 — PTCL-NOS, axilla/upper limb: More specific subtype classificationC84.64/C84.74 — ALCL ALK-positive/negative, axilla/upper limb: Specific ALCL diagnosisC83.34 — Diffuse large B-cell lymphoma, axilla/upper limb: B-cell originC84.A4 — Cutaneous T-cell lymphoma, axilla/upper limb: Skin-primary disease
Code Hierarchy
└C84Mature T/NK-cell lymphomas└C84.9Mature T/NK-cell lymphomas, unspecified└C84.94Mature T/NK-cell lymphomas, unspecified, lymph nodes of axilla and upper limb
└C84.94Mature T/NK-cell lymphomas, unspecified, lymph nodes of axilla and upper limb