ICD-10 Code C81.24 – Mixed cellularity Hodgkin lymphoma, lymph nodes of axilla and upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C81.24 – Mixed cellularity Hodgkin lymphoma, lymph nodes of axilla and upper limb
What it is
C81.24 identifies mixed cellularity Hodgkin lymphoma involving lymph nodes of the axilla and upper limb. Use it when the record specifies this histologic subtype and nodal location.
Clinical signs
Typical findings include enlarged axillary or upper-limb lymph nodes and other lymphoma features such as unexplained swelling or systemic “B” symptoms. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents mixed cellularity Hodgkin lymphoma and names axillary or upper-limb lymph nodes as the involved site. It also fits when pathology confirms the subtype and the site is clearly linked in the note. Check documentation if the site is described more broadly.
Do not use for
Do not use C81.24 if the lymphoma subtype is not mixed cellularity, or if the involved nodes are in another body region. Do not assign it when the record only says Hodgkin lymphoma without a specific site.
Coding tip
Verify both the histology and the exact lymph node location before coding.