ICD-10 Code C84.61 – Anaplastic large cell lymphoma, ALK-positive, lymph nodes of head, face, and neck (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C84.61 – Anaplastic large cell lymphoma, ALK-positive, lymph nodes of head, face, and neck
What it is
This code identifies anaplastic large cell lymphoma that is ALK-positive and involves lymph nodes in the head, face, or neck. Use it when the record clearly documents this specific lymphoma subtype and nodal site.
Clinical signs
Typical findings include enlarged lymph nodes in the head, face, or neck, with pathology confirming anaplastic large cell lymphoma and ALK positivity. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents ALK-positive anaplastic large cell lymphoma with primary or involved lymph nodes in the head, face, or neck. It is appropriate for confirmed diagnoses on pathology, oncology notes, or discharge summaries.
If the site is different, or ALK status is not stated, you should not assume this code. Check documentation and code the documented lymphoma type, molecular status, and anatomic location.
Do not use for
Do not use this code for ALK-negative disease, unspecified anaplastic large cell lymphoma, or lymphoma in another nodal region. Check documentation if the site or subtype is unclear.
Coding tip
Match all three elements in the chart: ALK-positive status, anaplastic large cell lymphoma, and lymph nodes of the head, face, or neck.