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Urinary tract infection (UTI) ICD-10 code

The ICD-10-CM code for urinary tract infection (uti) is N39.0 urinary tract infection, site not specified. It is billable and valid for submission on a claim. There are 14 related codes, and which one you use depends on what the documentation supports.

Also written as urinary tract infection, bladder infection.

The mistake coders make here

N39.0 is site unspecified. If the documentation localises it — cystitis, pyelonephritis — code the site instead. N39.0 also carries a 'use additional code' instruction to identify the organism, if it is known.

All ICD-10-CM codes for urinary tract infection (uti)

11 of 14 are billable. Green means you can submit it as-is.

CodeUse it when
N39.0Urinary tract infection, site not specified
P39.3Neonatal urinary tract infection
O86.2Urinary tract infection following deliverynot billable on its own
O86.29Other urinary tract infection following delivery
O23.4Unspecified infection of urinary tract in pregnancynot billable on its own
Z87.440Personal history of urinary (tract) infections
O23.3Infections of other parts of urinary tract in pregnancynot billable on its own
O23.41Unspecified infection of urinary tract in pregnancy, first trimester
O23.43Unspecified infection of urinary tract in pregnancy, third trimester
O23.42Unspecified infection of urinary tract in pregnancy, second trimester
O23.40Unspecified infection of urinary tract in pregnancy, unspecified trimester
N99.531Infection of continent stoma of urinary tract
O86.20Urinary tract infection following delivery, unspecified
O08.83Urinary tract infection following an ectopic and molar pregnancy
ICD-10-CMFY2026-Apr· effective April 1, 2026

Codes and descriptions are loaded directly from the CMS/NCHS ICD-10-CM release. The guidance on this page is ours — see our editorial policy. Reference information for professional coders; not medical or billing advice.