ICD-10 Code C84.75 – Anaplastic Large Cell Lymphoma, ALK-Negative, Lymph Nodes of Inguinal Region and Lower Limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C84.75 – Anaplastic large cell lymphoma, ALK-negative, lymph nodes of inguinal region and lower limb
What it is
This code identifies anaplastic large cell lymphoma that is ALK-negative and involves lymph nodes in the inguinal region or lower limb. Use it when the diagnosis and nodal location are documented clearly.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include enlarged lymph nodes in the groin or leg region, with pathology confirming anaplastic large cell lymphoma and ALK-negative status.
When to use this code
Use this code when the provider documents ALK-negative anaplastic large cell lymphoma affecting inguinal or lower-limb lymph nodes. It fits confirmed nodal disease in these sites, whether newly diagnosed or established. Check documentation if the record only says lymphoma, lymphoma NOS, or a different anatomic site.
Do not use for
Do not use it for ALK-positive anaplastic large cell lymphoma or for lymphoma in other lymph node regions. If the site is not specified or the diagnosis is uncertain, check documentation.
Coding tip
Code the exact histology, ALK status, and nodal location together; if any element is missing, verify the pathology or provider note.