A56.4
Chlamydial infection of pharynx
Clinical Classification Guidelines
Medical Intelligence & Overview
Chlamydial infection of the pharynx, classified under ICD-10 code A56.4, is a sexually transmitted infection caused by the bacterium *Chlamydia trachomatis*. It affects the throat region and is often associated with oral sexual activity. Although many individuals with this infection may experience mild or no symptoms, it has the potential to cause discomfort and may indicate other STI risks. Recognizing and understanding this condition is important for maintaining reproductive and overall health.
Causes & Symptoms
Clinical Causes: Unprotected oral sexual contact with an infected partner Transmission through oral-genital contact with a person carrying *Chlamydia trachomatis* Presence of asymptomatic infected individuals who unknowingly pass on the bacteria Poor sexual health practices that increase risk of infection
Key Symptoms: Soreness or discomfort in the throat Redness or inflammation of the pharynx Difficulty swallowing mild to moderate sore throat Possible swollen lymph nodes in the neck In some cases, no noticeable symptoms when infection is mild or asymptomatic
Diagnostic & Treatment
Diagnosis Path: Throat swab to collect a sample from the pharynx for laboratory testing Polymerase Chain Reaction (PCR) testing, which detects bacterial DNA with high accuracy Other nucleic acid amplification tests (NAATs) designed to identify chlamydial bacteria Additional testing for other sexually transmitted infections if indicated
Treatment Protocols: Doxycycline for a prescribed period, often 7 days Azithromycin as a single-dose alternative Avoiding sexual activity during treatment to prevent spreading the infection Partner notification and treatment to reduce reinfection risk
Clinical Advice & FAQs
Billing Guidance
Is A56.4 a billable ICD-10 code?
Yes, A56.4 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report A56.4?
Clinical documentation must specify the nature of Chlamydial infection of pharynx and any associated comorbidities for accurate reporting.
Cite this Clinical Reference