ICD-10 Code C83.15 – Mantle cell lymphoma, lymph nodes of inguinal region and lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.15 – Mantle cell lymphoma, lymph nodes of inguinal region and lower limb
What it is
C83.15 identifies mantle cell lymphoma involving lymph nodes in the inguinal region and lower limb. Use it when the record specifies this lymphoma subtype and the nodal site.
Clinical signs
Findings may include enlarged inguinal or lower-extremity lymph nodes, often with other lymphoma-related symptoms. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents mantle cell lymphoma in lymph nodes of the inguinal region or lower limb, including biopsy-confirmed disease. It is also appropriate when the site is clearly stated in the assessment or pathology report. Check documentation if multiple nodal regions are involved.
Do not use for
Do not use it for mantle cell lymphoma without a documented inguinal or lower-limb nodal site. Do not substitute it for other lymphoma subtypes or nonspecific lymphadenopathy.
Coding tip
Match the lymphoma subtype and anatomic site exactly to the provider’s wording before assigning C83.15.