What is the ICD-10 code for urinary tract infection (UTI)?

The ICD-10-CM code for urinary tract infection (UTI) is N39.0 when documented without further specification. More specific documentation changes the code — see the scenario table.

Yes — N39.0 is a billable ICD-10-CM code, but payers expect the most specific code the documentation supports.

ICD-10 Code for urinary tract infection (UTI)

The ICD-10-CM code for urinary tract infection (UTI) is N39.0 when documented without further specification. "UTI" without a documented site codes to N39.0 - and the organism, when known, is reported with an additional B95-B97 code.

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Which Code Should You Use?

N39.0 ✓ Billable — Urinary tract infection, site not specified

UTI, site not specified - the default for "UTI" documentation.

N30.00 ✓ Billable — Acute cystitis without hematuria

Acute cystitis without hematuria (bladder documented as the site).

N30.01 ✓ Billable — Acute cystitis with hematuria

Acute cystitis WITH hematuria.

N10 ✓ Billable — Acute pyelonephritis

Acute pyelonephritis (kidney involvement documented).

What to Document

Infection site when known (bladder/kidney changes the category).
Causative organism culture result (add B96.20 for E. coli, etc.).
Catheter association (T83.511- complication coding applies instead).

Instructional Notes for N39.0

Excludes1

Not coded here. These conditions should NOT be coded together 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.

Also Known As

Official ICD-10-CM Alphabetic Index terms that point to N39.0:

Infection, infected, infective (opportunistic) › urinary (tract)
Urine › pus in
Pus › in › urine

Coding Notes

N39.0 carries a "use additional code (B95-B97) to identify infectious agent" instruction - report the organism whenever the culture is documented.

Prevalence & Statistics

In 2022, urinary tract infection (site not specified) was the primary diagnosis at an estimated 1,655,000 emergency department visits in the United States, accounting for 1.1% of all ED visits. (CDC/NCHS National Hospital Ambulatory Medical Care Survey: 2022 Emergency Department Summary Tables (Table 11), 2022)