A56
Header — not billableOther sexually transmitted chlamydial diseases
The ICD-10 code for other sexually transmitted chlamydial diseases is A56.
A56 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 6 more specific codes below.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
Excludes2 (not included here)
An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.
Includes
Terms listed here further define or give examples of the conditions grouped under this code — they describe what the code covers, not a separate diagnosis.
- sexually transmitted diseases due to Chlamydia
- trachomatis
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under A56
- A56.0Chlamydial infection of lower genitourinary tractnon-billable header
- A56.1Chlamydial infection of pelviperitoneum and other genitourinary organsnon-billable header
- 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
Related codes in this category
- A50Congenital syphilisnon-billable header
- A51Early syphilisnon-billable header
- A52Late syphilisnon-billable header
- A53Other and unspecified syphilisnon-billable header
- A54Gonococcal infectionnon-billable header
- A55Chlamydial lymphogranuloma (venereum)
- A57Chancroid
- A58Granuloma inguinale
- A59Trichomoniasisnon-billable header
- A60Anogenital herpesviral [herpes simplex] infectionsnon-billable header
- A63Other predominantly sexually transmitted diseases, not elsewhere classifiednon-billable header
- A64Unspecified sexually transmitted disease
- A56Other sexually transmitted chlamydial diseasesnon-billable header