Chlamydial infection of pharynx

This code signifies an infection of the pharynx (throat) caused by Chlamydia trachomatis. It represents a sexually transmitted infection (STI) that can manifest with symptoms such as pharyngitis, sore throat, or may be asymptomatic.

Apply this code when documentation explicitly states a chlamydial infection of the pharynx, often identified through laboratory testing (e.g., NAAT) from a pharyngeal swab. It is appropriate for both symptomatic and asymptomatic cases confirmed to be chlamydial in origin and located in the throat.

• Ensure the documentation specifies the pharynx as the site of infection; do not use for chlamydial infections of other sites.
• Do not confuse with gonococcal pharyngitis (A54.5) or other bacterial pharyngitis.
• Consider co-infection with other STIs and code them separately if documented.