C96.9

HCC Category Mapping

What This Code Means

A cancer of the blood-forming and lymph tissues where the specific type has not been identified or documented.

Coding Tips

• •Use this code only when the specific type of lymphoid or hematopoietic malignancy cannot be determined from the medical record
• •Query the physician if more specific histology or subtype information is available to assign a more specific C96 code

Clinical Significance

This unspecified code represents a malignant neoplasm of lymphoid, hematopoietic, or related tissue where the specific histological type has not been identified. It typically reflects incomplete workup or pending pathology results, and its use should be temporary until a definitive diagnosis is established. Malignancies in this category carry variable prognoses depending on the ultimate subtype identified.

Documentation Requirements

• ✓This code should only be used when pathology results are pending or unavailable
• ✓once specific histology is obtained, the code should be updated to the appropriate specific diagnosis. Document the reason for unspecified status, any pending diagnostic studies, and the clinical presentation. Follow-up encounters should reflect updated pathology findings with a more specific code assignment.

Commonly Confused Codes