ICD-10-CM diagnosis code
A56.8 Sexually transmitted chlamydial infection of other sites
- Billable
- Yes, a complete code (FY2026)
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Other codes in A56
10 complete codes in this category.
- A56.00Chlamydial infection of lower genitourinary tract, unspecified
- A56.01Chlamydial cystitis and urethritis
- A56.02Chlamydial vulvovaginitis
- A56.09Other chlamydial infection of lower genitourinary tract
- A56.11Chlamydial female pelvic inflammatory disease
- A56.19Other chlamydial genitourinary infection
- A56.2Chlamydial infection of genitourinary tract, unspecified
- A56.3Chlamydial infection of anus and rectum
- A56.4Chlamydial infection of pharynx
- A56.8Sexually transmitted chlamydial infection of other sites
Documentation tips
- Make sure the note supports every element of the title, “Sexually transmitted chlamydial infection of other sites”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to A56.
The international WHO ICD-10 also has A56.8, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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