A56
Other sexually transmitted chlamydial diseases
A56 is a non-billable ICD-10-CM code category for other sexually transmitted chlamydial diseases. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are A56.0 Chlamydial infection of lower genitourinary tract; A56.1 Chlamydial infection of pelviperitoneum and other genitourinary organs; A56.2 Chlamydial infection of genitourinary tract, unspecified; A56.3 Chlamydial infection of anus and rectum and 2 more. Its coding notes include a Use additional code instruction, 4 Excludes1 entries and 8 Excludes2 entries.
Use additional code
Add the listed code as a secondary code, if known.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (6 notes)
- human immunodeficiency virus [HIV] disease (B20)
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Includes
Further defines or gives examples of the content of the category.
- sexually transmitted diseases due to Chlamydia
- trachomatis
Also from chapter/block level (1 note)
- diseases generally recognized as communicable or transmissible
More specific codes under A56 6
- A56.0Chlamydial infection of lower genitourinary tractHeader
- A56.1Chlamydial infection of pelviperitoneum and other genitourinary organsHeader
- A56.2Chlamydial infection of genitourinary tract, unspecifiedBillable
- A56.3Chlamydial infection of anus and rectumBillable
- A56.4Chlamydial infection of pharynxBillable
- A56.8Sexually transmitted chlamydial infection of other sitesBillable