ICD-10-CM · Chapter 1 · A00-B99
A56 Other sexually transmitted chlamydial diseases
Includes
- sexually transmitted diseases due to Chlamydia
- trachomatis
Excludes 1 (cannot be coded together)
- neonatal chlamydial conjunctivitis (P39.1)
- neonatal chlamydial pneumonia (P23.1)
Excludes 2 (not included here)
- chlamydial lymphogranuloma (A55)
- conditions classified to A74.-
Subcodes
Each subcode links to a detail page with full clinical annotations.
| Code | Description | Billable |
|---|---|---|
| A56..0 | Chlamydial infection of lower genitourinary tract | No |
| A56..00 | Chlamydial infection of lower genitourinary tract, unspecified | Yes |
| A56..01 | Chlamydial cystitis and urethritis | Yes |
| A56..02 | Chlamydial vulvovaginitis | Yes |
| A56..09 | Other chlamydial infection of lower genitourinary tract | Yes |
| A56..1 | Chlamydial infection of pelviperitoneum and other genitourinary organs | No |
| A56..11 | Chlamydial female pelvic inflammatory disease | Yes |
| A56..19 | Other chlamydial genitourinary infection | Yes |
| A56..2 | Chlamydial infection of genitourinary tract, unspecified | Yes |
| A56..3 | Chlamydial infection of anus and rectum | Yes |
| A56..4 | Chlamydial infection of pharynx | Yes |
| A56..8 | Sexually transmitted chlamydial infection of other sites | Yes |
Last reviewed: September 2026