A56.0Chlamydial infection of lower genitourinary tract

A56.0 is the ICD-10-CM diagnosis code for chlamydial infection of lower genitourinary tract. It belongs to category A56 (other sexually transmitted chlamydial diseases), block A50-A64 (infections with a predominantly sexual mode of transmission) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within A56 (other sexually transmitted chlamydial diseases), A56.0 is specifically for chlamydial infection of lower genitourinary tract. Related codes cover chlamydial infection of pelviperitoneum and other genitourinary organs (A56.1), chlamydial infection of genitourinary tract, unspecified (A56.2), chlamydial infection of anus and rectum (A56.3), chlamydial infection of pharynx (A56.4) and sexually transmitted chlamydial infection of other sites (A56.8).

To report this condition, pick the subcode that matches the documentation: A56.00 (unspecified), A56.01 (urethritis), A56.02 (vulvovaginitis) and A56.09 (tract).

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