ICD-10 Code C84.73 – Anaplastic large cell lymphoma, ALK-negative, intra-abdominal lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C84.73 – Anaplastic large cell lymphoma, ALK-negative, intra-abdominal lymph nodes
What it is
This code identifies anaplastic large cell lymphoma that is ALK-negative and involves intra-abdominal lymph nodes. Use it when documentation clearly specifies this lymphoma subtype and nodal location.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include enlarged abdominal lymph nodes, abdominal discomfort, or systemic lymphoma symptoms, but the record must support the specific diagnosis and site.
When to use this code
Use this code when the provider documents ALK-negative anaplastic large cell lymphoma in intra-abdominal lymph nodes. It is appropriate for confirmed primary or involved nodal disease in the abdomen when the site is explicitly stated.
If the record only says anaplastic large cell lymphoma without ALK status or location, check documentation before coding. You should also verify whether the diagnosis is current and whether another site is the principal documented location.
Do not use for
Do not use it for ALK-positive anaplastic large cell lymphoma or for lymphoma documented in a different nodal region. Check documentation if the pathology report or note does not specify ALK-negative status.
Coding tip
Code only after confirming both the ALK-negative subtype and the intra-abdominal lymph node site in the provider’s documentation.