ICD-10 Codes for Urinary Obstruction and Gross Hematuria
The ICD-10 code for urinary obstruction is N13.9 (obstructive uropathy, unspecified) or more specific codes depending on the etiology, while gross hematuria is coded as R31.0 (gross hematuria).
Primary ICD-10 Codes
Gross Hematuria
- R31.0 - Gross hematuria (macroscopic hematuria, visible blood in urine) 1, 2
- This code applies when blood is visibly present in the urine without microscopic examination 1
Urinary Obstruction
- N13.9 - Obstructive and reflux uropathy, unspecified 3
- N13.8 - Other obstructive and reflux uropathy 3
- N13.0 - Hydronephrosis with ureteropelvic junction obstruction 3
- N13.1 - Hydronephrosis with ureteral stricture, not elsewhere classified 3
- N13.30 - Unspecified hydronephrosis 3
Additional Relevant Codes Based on Etiology
If Obstruction is Due to Blood Clot
- N13.8 - Other obstructive uropathy (can be used for clot obstruction) 4
- R31.0 - Gross hematuria (as the underlying cause) 4, 5
If Urinary Retention is Present
Clinical Context for Code Selection
When Obstruction is Documented
- Use specific N13 codes when imaging or clinical findings confirm structural or functional urinary tract blockage 3
- Obstructive uropathy accounts for 5-10% of acute kidney injury cases and requires prompt identification 3
When Hematuria is the Primary Presentation
- R31.0 should be used for gross hematuria regardless of whether obstruction is present 1, 2
- Gross hematuria carries 30-40% association with malignancy and requires urgent evaluation 1, 2, 7
Important Coding Considerations
Multiple Diagnoses
- Both codes can be used together when a patient presents with both urinary obstruction and gross hematuria, as these conditions frequently coexist 4, 5
- Code the primary reason for the encounter first, followed by secondary diagnoses 3