D70.9

HCC Category Mapping

What This Code Means

A low white blood cell count where the underlying cause has not been determined or documented.

Coding Tips

• •This is the least specific neutropenia code; query the provider for more information about the cause
• •Review the medical record thoroughly to determine if a more specific D70 code should be used instead

Clinical Significance

Neutropenia, unspecified, indicates a documented low absolute neutrophil count without further characterization of the cause. This nonspecific code should prompt diagnostic evaluation to determine the etiology, as management varies significantly based on the underlying cause. It should be replaced with a more specific neutropenia code once the workup is complete.

Documentation Requirements

• ✓Document the absolute neutrophil count, clinical context (incidental finding, recurrent infections, medication use), and the diagnostic evaluation plan.
• ✓Record peripheral blood smear findings and whether hematology referral has been made.
• ✓Update the diagnosis code when the specific cause is determined.

Commonly Confused Codes