Other diseases caused by chlamydiae (A74)
The ICD-10 code section A74 is used to classify various diseases caused by chlamydiae bacteria, including specific infections like chlamydial conjunctivitis (A74.0) and chlamydial peritonitis (A74.81). These codes help identify infections caused by Chlamydia species beyond the most common genital infections.
This set of codes covers a range of conditions caused by chlamydiae, such as chronic chlamydial follicular conjunctivitis, also known as trachoma or inclusion conjunctivitis of the adult under A74.0. The code A74.81 is designated for Fitz-Hugh-Curtis syndrome, an inflammatory condition of the peritoneum associated with Chlamydia infection. Other less common manifestations like chlamydial colitis, dacryoadenitis, and neonatal infections are captured under A74.8 and A74.89. When the infection lacks specific details, A74.9 is used for an unspecified chlamydial infection, including those complicating pregnancy or childbirth. This grouping ensures that health professionals can accurately code and track diverse chlamydial diseases beyond typical sexually transmitted infections for comprehensive clinical documentation and billing.
Instructional Notations
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- neonatal chlamydial conjunctivitis P39.1
- neonatal chlamydial pneumonia P23.1
- Reiter's disease M02.3
- sexually transmitted chlamydial diseases A55 A56
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- chlamydial pneumonia J16.0
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Trachoma
A chronic infection of the CONJUNCTIVA and CORNEA caused by CHLAMYDIA TRACHOMATIS.
