ICD-10 Code: N39.0
Description: Urinary tract infection, site not specified
Category: Diseases of the genitourinary system (N00–N99)
Understanding the UTI ICD-10 Code
The UTI ICD-10 code is used when a patient is diagnosed with a urinary tract infection but the exact site of infection—such as the bladder or kidneys—is not recorded.
In such cases, the correct ICD-10 code for UTI is N39.0, representing “urinary tract infection, site not specified.”
When to Use ICD-10 Code N39.0
Use N39.0 when:
- The provider documents a urinary tract infection (ICD-10) without mentioning the affected organ.
- Lab results confirm infection, but no specific site is indicated.
- The diagnosis note reads “UTI, site not specified.”
Avoid N39.0 if the infection site is known. Instead, use:
- N30- for cystitis (bladder infection)
- N10 for pyelonephritis (kidney infection)
Related CPT Codes
| CPT Code | Description |
|---|---|
| 99213 | Office or outpatient visit |
| 81003 | Urinalysis |
| 87086 | Urine culture |
These are commonly paired with ICD-10 for urine infection to document evaluation and testing.
Quick Documentation Tips
- Always specify the infection site if known.
- Use N39.0 only when documentation states “site not specified.”
- Add a secondary code if a bacterial organism is identified.
Summary
The urinary tract infection ICD-10 code N39.0 is essential for accurate billing when the infection’s location isn’t clear. Clear documentation ensures compliance, reduces denials, and speeds up reimbursement.