ICD-10-CM 2027 diagnosis code
R31.0Gross hematuria
R31.0 is a valid, billable ICD-10-CM code for gross hematuria. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
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 R31.0
R31.0 is the ICD-10-CM diagnosis code for Gross hematuria. It belongs to category R31 (hematuria), 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 billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within R31 (hematuria), R31.0 is specifically for Gross hematuria. Related codes cover benign essential microscopic hematuria (R31.1), other microscopic hematuria (R31.2) and unspecified (R31.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 695 (Kidney and Urinary Tract Signs and Symptoms with MCC, relative weight 1.1139), DRG 696 (Kidney and Urinary Tract Signs and Symptoms without MCC, relative weight 0.6679), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 599.71 (Gross hematuria).
Notes that apply from higher levels
Instructions written at a parent level also apply to R31.0.
› From R31 Hematuria
Broader instructions also apply from Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to R31.0.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 11 · Diseases and Disorders of the Kidney and Urinary Tract
MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period
MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period
ICD-9-CM equivalent
Converter →- 599.71Gross hematuriaexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
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 R31.0
Is R31.0 billable?
- Yes. R31.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R31.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R31.0 as a principal diagnosis.
Is R31.0 a CC or MCC?
- No. R31.0 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does R31.0 group to?
- R31.0 is used in the MS-DRG v44.0 logic for MS-DRG 695 (Kidney and Urinary Tract Signs and Symptoms with MCC), MS-DRG 696 (Kidney and Urinary Tract Signs and Symptoms without MCC), MS-DRG 791 (Prematurity with Major Problems) and MS-DRG 793 (Full Term Neonate with Major Problems). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for R31.0?
- The CMS General Equivalence Mappings map R31.0 to ICD-9-CM 599.71.