ICD-10-CM 2027
ICD-10 code for hematuria
Confirmed by the official ICD-10-CM index entry “hematuria”. Page updated September 29, 2026.
About coding hematuria
The ICD-10-CM code for hematuria is R31.9 (Hematuria, unspecified). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R31.9.
It is also searched as blood in urine.
Within R31, choose R31.9 (unspecified) only when documentation doesn't support a more specific option: Gross hematuria (R31.0), benign essential microscopic hematuria (R31.1) and other microscopic hematuria (R31.2).
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.
Related Hematuria codes
Common questions about hematuria ICD-10 codes
What is the ICD-10 code for hematuria?
- R31.9 — Hematuria, unspecified. More specific codes apply when the documentation supports them: R31.0, R31.1, R31.21, R31.29.
What is the ICD-10 code for gross hematuria?
- R31.0 — Gross hematuria.
What is the ICD-10 code for benign essential microscopic hematuria?
- R31.1 — Benign essential microscopic hematuria.
What is the ICD-10 code for asymptomatic microscopic hematuria?
- R31.21 — Asymptomatic microscopic hematuria.
What is the ICD-10 code for other microscopic hematuria?
- R31.29 — Other microscopic hematuria.
Is R31.9 billable?
- Yes. R31.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R31.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R31.9 as a principal diagnosis.
Is R31.9 a CC or MCC?
- No. R31.9 is neither a CC nor an MCC under MS-DRG v44.0.