O23.40 — Unspecified infection of urinary tract in pregnancy, unspecified trimester

O23.40

ICD-10 Chapter 15: Pregnancy, Childbirth & Puerperium — illustrative image — Chapter 15: Pregnancy, childbirth and the puerperium (O00–O9A) — illustrative image

What this code means

A urinary tract infection occurring in pregnancy; the trimester is not specified.

Also called: uti in pregnancy, urinary tract infection in pregnancy.

When this code is used

Used for unspecified infection of urinary tract in pregnancy, unspecified trimester.

Where it sits in ICD-10-CM

Code O23.40 belongs to Chapter 15: Pregnancy, childbirth and the puerperium, which covers codes O00–O9A in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Learn more about this condition

Condition guide: Pregnancy

Related symptoms

Pain or burning when urinating

Frequently asked questions

What is ICD-10-CM code O23.40?

O23.40 is the ICD-10-CM diagnosis code for “Unspecified infection of urinary tract in pregnancy, unspecified trimester”. A urinary tract infection occurring in pregnancy; the trimester is not specified.

When is code O23.40 used?

Used for unspecified infection of urinary tract in pregnancy, unspecified trimester. It belongs to Chapter 15 of ICD-10-CM (Pregnancy, childbirth and the puerperium).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.