A56.19Other chlamydial genitourinary infection

A56.19 is the ICD-10-CM diagnosis code for other chlamydial genitourinary infection. 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 billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within A56.1, choose A56.19 (Other chlamydial genitourinary infection) only when documentation doesn't support a more specific option: chlamydial female pelvic inflammatory disease (A56.11).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 689 (Kidney and Urinary Tract Infections with MCC, relative weight 1.1415) and DRG 690 (Kidney and Urinary Tract Infections without MCC, relative weight 0.801), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

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

Before ICD-10, this condition was coded in ICD-9-CM as 099.54 (other venereal diseases due to chlamydia trachomatis, other genitourinary sites).