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Test Name

Chlamydia trachomatis Antibody (IgM)

CPT Code(s)

86632

Methodology

Immunofluorescence Assay (IFA)

Reference Range(s)

<1:10

Clinical Significance

Chlamydia trachomatis is associated with infections of the mucous membranes of the urogenital system, the upper respiratory tract, and the eye. The usefulness of serological tests depends on the site of infection, duration of disease, infecting serovars and previous exposure to chlamydial antigens. Because C. trachomatis is ubiquitous, there is a high prevalence of antibodies in sexually active populations. Individuals may be reinfected and IgM antibodies may not appear. IgG antibodies may persist even after treatment, making assessment of a single IgG titer difficult. Consequently, serological diagnosis is seldom used to diagnose genital tract infections. Instead, Nucleic Acid Amplification Testing (NAAT) or culture should be considered to detect chlamydia trachomatis. Culture can also be used to diagnose infant respiratory infection or conjunctivitis.

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Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.

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Chlamydia trachomatis Antibody (IgM)
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