R31.21

Asymptomatic microscopic hematuria

Billable code

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · R31.21

Synonyms

AMH

Inherited from R31Hematuria

Excludes 1

hematuria included with underlying conditions, such as: acute cystitis with hematuria (N30.01) recurrent and persistent hematuria in glomerular diseases (N02.-)

Inherited from chapter 18Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

Excludes 2

abnormal findings on antenatal screening of mother (O28.-) certain conditions originating in the perinatal period (P04-P96) signs and symptoms classified in the body system chapters signs and symptoms of breast (N63, N64.5)

Official Guidelines for R31.21

FY 2026 ›

I.C.18Chapter-specific guidanceChapter 18: Symptoms, signs, and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

Subsections

Sections that reference R31.21

Sections whose FY 2026 text names R31.21, its R31 category, or a range containing it — the chapter guidance above is the authoritative source.

Find R31.21 in the alphabetic index

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