Hematuria ICD-10-CM codes

R31.0 is gross (visible) hematuria. R31.1 is benign essential microscopic hematuria, which requires the provider to document that specific diagnosis. R31.21 is asymptomatic microscopic hematuria, the usual code for blood found on a routine urinalysis in a patient without urinary symptoms, and R31.29 is other microscopic hematuria. R31.9 is hematuria, unspecified, when the record does not say whether it was gross or microscopic.

Hematuria is not reported when the cause has been identified: a urinary tract infection is N39.0, a kidney stone N20.0, bladder cancer C67.9. Recurrent and persistent hematuria of glomerular origin is category N02 (N02.9 unspecified), a disease category that is assigned only when the provider documents a glomerular cause. Proteinuria found with hematuria is coded separately (R80.9).

For cystoscopy or imaging ordered to evaluate hematuria, R31.- is the reason for the encounter until a diagnosis is made. If the workup is negative, the R31 code remains the final diagnosis. The urine dipstick finding of blood without red cells on microscopy is not hematuria and should not be coded as R31 unless the provider documents it as such.