N39.0: Urinary tract infection, site not specified
Billable ICD-10-CM code, FY2027
What ICD-10-CM says
Excludes1 (never coded with N39.0)
- candidiasis of urinary tract (B37.4-)
- neonatal urinary tract infection (P39.3)
- pyuria (R82.81)
- urinary tract infection of specified site, such as:
- cystitis (N30.-)
- pyonephrosis (N13.6)
- urethritis (N34.-)
Use additional code
- code (B95-B97), to identify infectious agent.
Notes at N39, Other disorders of urinary system (they apply to every code under it)
Excludes2 (not part of N39.0; both may be coded)
- hematuria NOS (R31.-)
- recurrent or persistent hematuria (N02.-)
- recurrent or persistent hematuria with specified morphological lesion (N02.-)
- proteinuria NOS (R80.-)
What N39.0 covers
N39.0 is for a urinary tract infection when the site is not documented. If the provider names the site, such as the bladder or urethra, a site-specific code is used instead.
Primary care, urgent care, urology and OB-GYN use it. Cystitis is N30.-, urethritis N34.-, acute pyelonephritis N10 and pyonephrosis N13.6. Pyuria without a diagnosed infection is R82.81.
Billing and coding notes
N39.0 asks for an additional code from B95-B97 to identify the organism when it is known, such as B96.20 for E. coli. Leave it off when the organism is not documented.
The excludes1 list at N39.0 includes UTI of a specified site (cystitis, urethritis, pyonephrosis), candidiasis of the urinary tract (B37.4-), neonatal UTI (P39.3) and pyuria (R82.81). If the note says cystitis, code N30.- and not N39.0.
Related codes under N39
Questions about N39.0
Is N39.0 used for cystitis?
No. Cystitis is a UTI of a specified site and is an excludes1 at N39.0. Use the N30.- code that matches the documentation.
Do I need to add an organism code with N39.0?
When the organism is known, yes. The tabular says to use an additional B95-B97 code to identify the infectious agent.
ICD-10-CM in CloudMedico
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