ICD-10 Code C85.90 – Non-Hodgkin lymphoma, unspecified, unspecified site (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C85.90 – Non-Hodgkin lymphoma, unspecified, unspecified site
What it is
C85.90 identifies Non-Hodgkin lymphoma when the record does not specify the exact lymphoma type or the involved site. Use it only when the documentation supports lymphoma but lacks needed detail.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include enlarged lymph nodes, unexplained weight loss, fever, night sweats, or other signs of lymphoma, but the exact presentation depends on the subtype.
When to use this code
Use this code when the provider documents Non-Hodgkin lymphoma and does not identify a more specific histology or location. It is appropriate for incomplete records, pending pathology details, or nonspecific problem lists. Query if the chart can support a more specific code.
Do not use for
Do not use C85.90 when the lymphoma subtype, such as diffuse large B-cell lymphoma or follicular lymphoma, is documented. Do not use it for Hodgkin lymphoma or for a clearly identified primary site.
Coding tip
Always review pathology, oncology notes, and imaging for a more precise lymphoma code before defaulting to unspecified.