2026 ICD-10-CM Diagnosis Code R31Hematuria

ICD-10-CM Codes›R00–R99›R30-R39›R31

ICD-10-CM R31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R31 is a non-billable ICD-10-CM category code for hematuria, so it cannot be submitted on claims. Use a more specific code from this category instead, such as R31.0, R31.1, R31.21, and R31.29. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established.

Code Identity

ICD-10-CM Code
R31
Billable Status
No — Non-Billable Category
Code Describes
Hematuria
Short Description
Hematuria
Same as the full description in the CMS dataset.
Chapter
R30-R39
Symptoms and signs involving the genitourinary system

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR30-R39Symptoms and signs involving the genitourinary system
CategoryR31Hematuria
This CodeR31Hematuria

Specific Coding for HematuriaOverview

Non-specific codes like R31 require more characters. Use one of these billable codes instead:

  • Use R31.0 for Gross hematuria

  • Use R31.1 for Benign essential microscopic hematuria

  • R31.2 for Other microscopic hematuria

  • Use R31.21 for Asymptomatic microscopic hematuria

  • Use R31.29 for Other microscopic hematuria

  • Use R31.9 for Hematuria, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

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

Clinical InformationClinical

  • Hematuria

    presence of blood in the urine.

  • Nephritis, Hereditary

    a group of inherited conditions characterized initially by hematuria and slowly progressing to renal insufficiency. the most common form is the alport syndrome (hereditary nephritis with hearing loss) which is caused by mutations in genes for type iv collagen and defective glomerular basement membrane.

Patient EducationClinical

Urine and Urination

Your kidneys make urine by filtering wastes and extra water from your blood. The waste is called urea. Your blood carries it to the kidneys. From the kidneys, urine travels down two thin tubes called ureters to the bladder. The bladder stores urine until you are ready to urinate.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R31Overview

Is R31 (Hematuria) a billable code?

No. This is a category header that groups the codes for hematuria, and headers cannot be submitted on claims. Claims for hematuria need a more specific code from this category, such as R31.0, R31.1, and R31.21.

Can R31 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the hematuria is established, that condition takes the principal position instead.