ICD-10 Code C84.77 – Anaplastic large cell lymphoma, ALK-negative, spleen (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C84.77 – Anaplastic large cell lymphoma, ALK-negative, spleen
What it is
C84.77 identifies anaplastic large cell lymphoma that is ALK-negative and involves the spleen. Use it when the record clearly documents this specific lymphoma subtype and site.
Clinical signs
Clinical features vary; refer to documentation. Findings may include splenic involvement in a confirmed lymphoma diagnosis, with pathology or imaging supporting the site and subtype.
When to use this code
Use this code when the provider documents ALK-negative anaplastic large cell lymphoma affecting the spleen. It is appropriate for confirmed primary or involved splenic disease when the diagnosis is specific enough for coding. Check documentation if the record only says lymphoma, ALCL, or splenic mass without subtype confirmation.
Do not use for
Do not use it for ALK-positive anaplastic large cell lymphoma, other non-Hodgkin lymphomas, or nonspecific splenic enlargement. Check documentation if the spleen is only suspected or not clearly linked to the lymphoma.
Coding tip
Code the exact histology, ALK status, and spleen site only when all are documented together.