ICD-10 Code C84.7A – Anaplastic large cell lymphoma, ALK-negative, breast (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C84.7A – Anaplastic large cell lymphoma, ALK-negative, breast
What it is
This code identifies an anaplastic large cell lymphoma that is ALK-negative and documented as involving the breast. Use it when the record clearly states this specific lymphoma site and subtype.
Clinical signs
Clinical features vary; refer to documentation. Breast involvement may present as a breast mass, swelling, or other lymphoma findings, but coding should follow the confirmed pathology and site description.
When to use this code
Use this code when the provider documents ALK-negative anaplastic large cell lymphoma of the breast, including a primary breast presentation or breast involvement explicitly attributed to this lymphoma. It may also apply when pathology or oncology notes confirm the site and subtype. Check documentation if the breast site is suspected but not confirmed.
Do not use for
Do not use it for other breast malignancies, nonspecific lymphoma, or ALK-positive anaplastic large cell lymphoma. If the breast site or ALK-negative status is not documented, check documentation.
Coding tip
Code the exact lymphoma subtype and anatomic site only when both are clearly stated in the chart.