ICD-10 Code C96.9 – Malignant neoplasm of lymphoid, hematopoietic and related tissue, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C96.9 – Malignant neoplasm of lymphoid, hematopoietic and related tissue, unspecified
What it is
C96.9 identifies a malignant neoplasm involving lymphoid, hematopoietic, or related tissue when the specific site or type is not documented. Use it for an unspecified cancer in this tissue group.
Clinical signs
Clinical features vary; refer to documentation. Findings may reflect an underlying hematologic malignancy, but this code itself does not define a specific subtype or location.
When to use this code
Use C96.9 when the record confirms a malignant neoplasm of lymphoid, hematopoietic, or related tissue, but the provider does not specify the exact entity. It is appropriate when pathology, oncology notes, or discharge documentation remain nonspecific.
If later documentation identifies a more precise diagnosis, you should code that specific condition instead. Check documentation before assigning this unspecified code for final reporting.
Do not use for
Do not use this code for benign, in situ, or uncertain behavior lesions. Also avoid it when the diagnosis is a more specific lymphoma, leukemia, or related malignancy that is documented elsewhere.
Coding tip
Query the provider when the chart says only “lymphoid malignancy” or “hematopoietic cancer” without a clearer diagnosis.