ICD-10 Code C84.44 – Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of axilla and upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C84.44 – Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of axilla and upper limb
What it is
This code identifies peripheral T-cell lymphoma, not otherwise specified, involving lymph nodes in the axilla or upper limb. Use it when documentation clearly states this lymphoma subtype and the nodal site.
Clinical signs
Clinical features vary; refer to documentation. Patients may present with enlarged lymph nodes in the axilla or upper limb region, and diagnosis is typically confirmed by pathology and clinical staging.
When to use this code
Use C84.44 when the record specifies peripheral T-cell lymphoma, not elsewhere classified, and names axillary or upper-limb lymph nodes as the involved site. Apply it for confirmed primary or involved nodal disease at that location. Check documentation if the site is described more generally or if another lymphoma subtype is named.
Do not use for
Do not use this code for unspecified lymphoma, other T-cell lymphoma types, or disease limited to non-nodal sites. If the axillary or upper-limb involvement is not documented, check documentation.
Coding tip
Verify both the lymphoma subtype and the exact lymph node region before assigning C84.44.