A56Header code — not billable
Other sexually transmitted chlamydial diseases
- Chapter
- 1. Certain infectious and parasitic diseases
- Category
- A56
- Effective date
- October 1, 2026
Related codes in category A56
A56.0Chlamydial infection of lower genitourinary tractA56.00Chlamydial infection of lower genitourinary tract, unspYesA56.01Chlamydial cystitis and urethritisYesA56.02Chlamydial vulvovaginitisYesA56.09Other chlamydial infection of lower genitourinary tractYesA56.1Chlamydial infection of pelviperitoneum and oth GU organsA56.11Chlamydial female pelvic inflammatory diseaseYesA56.19Other chlamydial genitourinary infectionYesA56.2Chlamydial infection of genitourinary tract, unspecifiedYesA56.3Chlamydial infection of anus and rectumYesA56.4Chlamydial infection of pharynxYesA56.8Sexually transmitted chlamydial infection of other sitesYes
Frequently asked questions
What is ICD-10 code A56?
A56 is an ICD-10-CM diagnosis code for Other sexually transmitted chlamydial diseases.
Is A56 a billable code?
No. A56 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is A56 in?
A56 falls under Chapter 1: Certain infectious and parasitic diseases.
When did A56 become effective?
A56 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to A56?
A56 belongs to category A56, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.