O23.4Unspecified infection of urinary tract in pregnancy

O23.4 is the ICD-10-CM diagnosis code for unspecified infection of urinary tract in pregnancy. It belongs to category O23 (infections of genitourinary tract in pregnancy), block O20-O29 (other maternal disorders predominantly related to pregnancy) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within O23, choose O23.4 (Unspecified infection of urinary tract in pregnancy) only when documentation doesn't support a more specific option: infections of kidney in pregnancy (O23.0), infections of bladder in pregnancy (O23.1), infections of urethra in pregnancy (O23.2), infections of other parts of urinary tract in pregnancy (O23.3), infections of the genital tract in pregnancy (O23.5) and unspecified genitourinary tract infection in pregnancy (O23.9).

To report this condition, pick the subcode that matches the documentation: O23.40 (unspecified trimester), O23.41 (first trimester), O23.42 (second trimester) and O23.43 (third trimester).

Use an additional code to identify organism (B95.-, B96.-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.