ICD-10 Code C96.A – Histiocytic Sarcoma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C96.A – Histiocytic sarcoma
What it is
C96.A identifies histiocytic sarcoma, a rare malignant neoplasm of histiocytic lineage. Use it when documentation specifically states this diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Reports may describe an aggressive mass, lymph node involvement, or extranodal disease, but the diagnosis should be confirmed by pathology.
When to use this code
Use C96.A when the provider documents histiocytic sarcoma as the confirmed diagnosis. It is also appropriate when pathology or specialist notes clearly identify this tumor. If the record only says “histiocytic disorder” or is uncertain, check documentation before coding.
Do not use for
Do not use this code for benign histiocytic conditions, nonspecific histiocytosis, or other hematologic malignancies. If the exact tumor type is not stated, do not assume histiocytic sarcoma.
Coding tip
Code only after the diagnosis is explicitly documented; pathology wording is often the best source.