A56: Other sexually transmitted chlamydial diseases
Codes under A56 (Other sexually transmitted chlamydial diseases). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| A56.0 | Chlamydial infection of lower genitourinary tract | — |
| A56.0 | Chlamydial infection of lower genitourinary tract | — |
| A56.00 | Chlamydial infection of lower genitourinary tract, unspecified | ✓ |
| A56.00 | Chlamydial infection of lower genitourinary tract, unspecified | ✓ |
| A56.01 | Chlamydial cystitis and urethritis | ✓ |
| A56.01 | Chlamydial cystitis and urethritis | ✓ |
| A56.1 | Chlamydial infection of pelviperitoneum and other genitourinary organs | — |
| A56.1 | Chlamydial infection of pelviperitoneum and other genitourinary organs | — |
| A56.02 | Chlamydial vulvovaginitis | ✓ |
| A56.02 | Chlamydial vulvovaginitis | ✓ |
| A56.2 | Chlamydial infection of genitourinary tract, unspecified | ✓ |
| A56.2 | Chlamydial infection of genitourinary tract, unspecified | ✓ |
| A56.3 | Chlamydial infection of anus and rectum | ✓ |
| A56.3 | Chlamydial infection of anus and rectum | ✓ |
| A56.4 | Chlamydial infection of pharynx | ✓ |
| A56.4 | Chlamydial infection of pharynx | ✓ |
| A56.8 | Sexually transmitted chlamydial infection of other sites | ✓ |
| A56.8 | Sexually transmitted chlamydial infection of other sites | ✓ |
| A56.09 | Other chlamydial infection of lower genitourinary tract | ✓ |
| A56.09 | Other chlamydial infection of lower genitourinary tract | ✓ |
| A56.11 | Chlamydial female pelvic inflammatory disease | ✓ |
| A56.11 | Chlamydial female pelvic inflammatory disease | ✓ |
| A56.19 | Other chlamydial genitourinary infection | ✓ |
| A56.19 | Other chlamydial genitourinary infection | ✓ |
Frequently asked questions
What is ICD-10-CM code A56?
A56 is an ICD-10-CM category covering Other sexually transmitted chlamydial diseases. It contains 24 more specific diagnosis codes, 20 of which are billable.
Is A56 a billable code?
No — A56 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example A56.0 — Chlamydial infection of lower genitourinary tract). 20 of the 24 codes under A56 are billable.
What codes fall under A56?
A56 includes A56.0, A56.0, A56.00, A56.00, A56.01, plus 19 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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