ICD-10 Code C96.4 – Sarcoma of dendritic cells (accessory cells) (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C96.4 – Sarcoma of dendritic cells (accessory cells)
What it is
C96.4 identifies a rare malignant neoplasm arising from dendritic or accessory cells of the immune system. Use it when documentation specifically names sarcoma of dendritic cells (accessory cells).
Clinical signs
Clinical features vary; refer to documentation. Presentation may include a mass or other findings of a malignant hematologic or soft tissue neoplasm, but the diagnosis should be supported by the provider’s specific wording.
When to use this code
Use C96.4 when the record clearly states sarcoma of dendritic cells (accessory cells), including pathology or oncology notes. It is appropriate when the provider documents this exact tumor type and no more specific site-based code applies.
If the diagnosis is only suspected, or the note uses a broader lymphoma, leukemia, or unspecified neoplasm term, check documentation before coding. Code the confirmed condition documented by the treating provider.
Do not use for
Do not use C96.4 for unspecified malignant neoplasms, other sarcomas, or general immune-cell tumors. If the chart does not explicitly identify dendritic-cell sarcoma, check documentation.
Coding tip
Match the code to the exact pathology wording; if the report is vague, query for clarification before assigning C96.4.