ICD-10 Code C84.63 – Anaplastic large cell lymphoma, ALK-positive, intra-abdominal lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C84.63 – Anaplastic large cell lymphoma, ALK-positive, intra-abdominal lymph nodes
What it is
This code identifies anaplastic large cell lymphoma that is ALK-positive and involves intra-abdominal lymph nodes. Use it for a confirmed diagnosis documented by the clinician.
Clinical signs
Clinical features vary; refer to documentation. Common findings in lymphoma include enlarged lymph nodes, abdominal mass or pain, and systemic “B” symptoms such as fever, night sweats, or weight loss.
When to use this code
Use this code when the provider documents ALK-positive anaplastic large cell lymphoma with disease in intra-abdominal lymph nodes. It is appropriate for confirmed site-specific lymphoma coding in the inpatient or outpatient record. Check documentation if the record does not clearly identify ALK status or nodal location.
Do not use for
Do not use this code for unspecified lymphoma, ALK-negative disease, or lymphoma limited to another anatomic site. Do not assign it when intra-abdominal node involvement is not documented.
Coding tip
Verify both ALK-positive status and intra-abdominal lymph node involvement in the provider note before assigning C84.63.