A74.81
Chlamydial peritonitis
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 11 never code together
A74code
A00-B99chapter
Excludes1
- certain localized infections - see body system-related chapters
Excludes2
- carrier or suspected carrier of infectious disease (Z22.-)Z22.-
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)O98.-
- infectious and parasitic diseases specific to the perinatal period (P35-P39)P35-P39
- influenza and other acute respiratory infections (J00-J22)J00-J22
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 2
Index entries leading here 4
- Chlamydia, chlamydial A74.9
- peritonitis A74.81
- Peritonitis (adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) K65.9
- chlamydial A74.81
- Fitzhugh-Curtis syndrome
- due to
- Chlamydia trachomatis A74.81
- due to
- Syndrome — see also Disease
- Fitzhugh-Curtis
- due to
- Chlamydia trachomatis A74.81
- due to
- Fitzhugh-Curtis
Alongside this code 1 same parent — A74.8
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.