ICD-10 Code C83.34 – Diffuse large B-cell lymphoma, lymph nodes of axilla and upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.34 – Diffuse large B-cell lymphoma, lymph nodes of axilla and upper limb
What it is
This code identifies diffuse large B-cell lymphoma involving lymph nodes in the axilla or upper limb. Use it when the record specifies this lymphoma subtype and the nodal site.
Clinical signs
Clinical features vary; refer to documentation. Commonly, you will see enlarged lymph nodes in the axilla or upper limb region, with pathology confirming diffuse large B-cell lymphoma.
When to use this code
Use C83.34 when the provider documents diffuse large B-cell lymphoma affecting lymph nodes of the axilla or upper limb. The diagnosis should identify both the histology and the nodal location. If the site is described differently or is unclear, check documentation before coding.
Do not use for
Do not use this code for lymphoma at a different lymph node site or for a different B-cell lymphoma subtype. If the note only says “lymphoma” without the specific type and location, check documentation.
Coding tip
Verify the pathology wording and anatomic site together; both must match this code.