ICD-10 Code C83 – Non-follicular lymphoma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C83 – Non-follicular lymphoma
What it is
C83 identifies non-follicular lymphoma, a group of malignant lymphoid cancers that do not arise from follicle center cells. Use it when the record documents this lymphoma type without a more specific subtype.
Clinical signs
Common findings include enlarged lymph nodes, unexplained weight loss, fever, night sweats, or fatigue. Clinical features vary; refer to documentation for the exact lymphoma subtype and site.
When to use this code
Use C83 when the clinician documents non-follicular lymphoma and no more specific ICD-10-CM code is available in the record. It may also fit when pathology or oncology notes describe the diagnosis broadly, but do not name a follicular subtype. Check documentation if the chart gives a precise histology.
Do not use for
Do not use C83 for follicular lymphoma or for lymphoma types with a specific, separately coded diagnosis. Check documentation when the note describes leukemia, metastatic cancer, or an uncertain lymphoid disorder.
Coding tip
Confirm the exact histology from pathology or oncology notes before assigning C83.