ICD-10 Code C83.11 – Mantle cell lymphoma, lymph nodes of head, face, and neck (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83.11 – Mantle cell lymphoma, lymph nodes of head, face, and neck
What it is
C83.11 identifies mantle cell lymphoma involving lymph nodes in the head, face, or neck. Use it when the record specifies this anatomic site and the diagnosis is mantle cell lymphoma.
Clinical signs
Clinical features vary; refer to documentation. Commonly, you may see enlarged cervical or facial lymph nodes, with diagnosis confirmed by pathology and clinician documentation of mantle cell lymphoma.
When to use this code
Use this code when the provider documents mantle cell lymphoma limited to, or involving, lymph nodes of the head, face, or neck. It is appropriate for confirmed diagnoses in outpatient, inpatient, and follow-up records when the site is specified.
If the note only says mantle cell lymphoma without a nodal site, check documentation before assigning this code. If another nodal region is documented, code the site that matches the record.
Do not use for
Do not use C83.11 for unspecified mantle cell lymphoma or for lymphoma in a different lymph node region. Check documentation if the site is unclear or if the record describes a different lymphoma type.
Coding tip
Confirm both the lymphoma subtype and the exact lymph node location before coding.