ICD-10 Code C82.65 – Cutaneous follicle center lymphoma, lymph nodes of inguinal region and lower limb (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C82.65 – Cutaneous follicle center lymphoma, lymph nodes of inguinal region and lower limb
What it is
This code identifies cutaneous follicle center lymphoma involving the lymph nodes of the inguinal region and lower limb. It is a lymphoma diagnosis tied to a specific anatomic site, so you should code it when documentation confirms that location.
Clinical signs
Clinical features vary; refer to documentation. Standard references describe skin-based lymphoma lesions or nodules, with possible regional lymph node involvement in the groin or lower extremity area.
When to use this code
Use this code when the provider documents cutaneous follicle center lymphoma and specifies the inguinal region or lower limb lymph nodes. It may also apply when pathology or oncology notes clearly link the lymphoma to that site. If the site is not explicit, check documentation before coding.
Do not use for
Do not use this code for unspecified cutaneous follicle center lymphoma or for other lymphoma subtypes. If the record does not confirm inguinal or lower-limb lymph node involvement, check documentation.
Coding tip
Match the diagnosis wording and the documented nodal site exactly; site detail drives this code.