ICD-10-CM 2027 diagnosis code

R31Hematuria

Not billable — use a more specific code

R31 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R31

R31 is the ICD-10-CM diagnosis code for hematuria. It belongs to block R30-R39 (symptoms and signs involving the genitourinary system) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: R31.0 (hematuria), R31.1 (hematuria), R31.2 (hematuria) and R31.9 (unspecified).

Don't report R31 together with the conditions in its Excludes1 note: acute cystitis with hematuria (N30.01) and recurrent and persistent hematuria in glomerular diseases (N02.-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under R31

Coding notes

Excludes1Not coded here — never report together with this code

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

Notes that apply from higher levels

Instructions written at a parent level also apply to R31.

Broader instructions also apply from Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Codes whose notes reference R31

N02Excludes1
N39Excludes2
N42.1Excludes1
R82Excludes2

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about R31

Is R31 billable?: No. R31 is a header code. Report one of its more specific subcodes instead.