ICD-10 Code C84.95 – Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C84.95 – Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limb
What it is
This code identifies a mature T-cell or NK-cell lymphoma affecting lymph nodes in the inguinal region or lower limb, when the subtype is not further specified. Use it for documented nodal disease in that anatomic site.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include enlarged inguinal nodes, other lymphadenopathy, or biopsy evidence of mature T/NK-cell lymphoma involving those nodes.
When to use this code
Use this code when the record clearly states mature T/NK-cell lymphoma, unspecified subtype, with lymph node involvement in the inguinal region or lower limb. It is appropriate when pathology, oncology notes, or discharge summaries specify that location.
If the site is documented but the exact histologic subtype is not named, this code captures the diagnosis as recorded. Check documentation when disease is described as skin, blood, or another nodal region instead.
Do not use for
Do not use this code for a more specific mature T-cell or NK-cell lymphoma subtype, or for lymphomas in a different nodal region. Do not assign it when the chart only mentions suspected disease; check documentation.
Coding tip
Confirm both the lymphoma type and the inguinal/lower-limb nodal site before assigning C84.95.