ICD-10 Code C84.14 – Sézary disease, lymph nodes of axilla and upper limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C84.14 – Sézary disease, lymph nodes of axilla and upper limb
What it is
C84.14 identifies Sézary disease involving lymph nodes in the axilla and upper limb region. Use it when the record specifies this anatomic nodal site as part of the diagnosis.
Clinical signs
Sézary disease is a cutaneous T-cell lymphoma that may present with diffuse skin redness, itching, and enlarged lymph nodes. Clinical features vary; refer to documentation for confirmed nodal involvement.
When to use this code
Use C84.14 when the provider documents Sézary disease with lymph node involvement specifically in the axilla or upper limb. You may also use it when pathology or oncology notes clearly localize the disease to those nodes. If the site is not stated, check documentation before assigning this code.
Do not use for
Do not use this code for generalized lymphadenopathy, other lymphoma subtypes, or Sézary disease without documented axillary or upper-limb nodal involvement. Check documentation if the anatomic site is unclear.
Coding tip
Match the code to the exact nodal location in the record; if the site is only implied, query the provider.