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2025 ICD-10-CM code A74

Other diseases caused by chlamydiae. This excludes neonatal chlamydial conjunctivitis (P39.1), neonatal chlamydial pneumonia (P23.1), Reiter's disease (M02.3-), sexually transmitted chlamydial diseases (A55-A56), and chlamydial pneumonia (J16.0).

Ensure proper code assignment by confirming the infection site and excluding conditions addressed by other chlamydial codes (e.g., A55-A56, J16.0, P23.1, P39.1). Use additional codes for manifestations or complications. Always adhere to official ICD-10-CM coding guidelines.

Medical necessity for using A74 is established by confirming a Chlamydia trachomatis infection in a location or clinical context not covered by more specific chlamydial codes.The documentation must support the diagnosis and the atypical nature of the infection.

Diagnosis involves evaluating patient history, physical examination, and laboratory tests like NAAT, direct immunofluorescence, or ELISA. Treatment includes antibiotic therapy (e.g., doxycycline, azithromycin) and advising abstinence from sexual activity during treatment. Patient education on safe sex practices and partner notification are crucial for preventing reinfection and spread.

IMPORTANT:Excludes1: neonatal chlamydial conjunctivitis (P39.1) neonatal chlamydial pneumonia (P23.1) Reiter's disease (M02.3-) sexually transmitted chlamydial diseases (A55-A56) Excludes2: chlamydial pneumonia (J16.0)

In simple words: This code is used when someone has an infection caused by the bacteria Chlamydia, but it's not one of the common types like a sexually transmitted infection or lung infection. It means the infection is in a different part of the body.

This code represents other diseases caused by chlamydiae, excluding specific conditions like sexually transmitted chlamydial diseases and chlamydial pneumonia. It encompasses infections caused by Chlamydia trachomatis that manifest outside the typical sites like the genital tract or lungs.It's essential to differentiate this code from more specific chlamydial infection codes.

Example 1: A patient presents with symptoms of conjunctivitis, but tests confirm Chlamydia trachomatis infection rather than a typical viral or bacterial cause.As this is not neonatal conjunctivitis, A74 is appropriate., A patient develops a Chlamydia trachomatis infection of the pharynx, confirmed through laboratory testing. Since this is not a typical sexually transmitted chlamydial infection, code A74 is used., A biopsy reveals Chlamydia trachomatis in an unusual location, such as the liver, in a patient with systemic symptoms.This would be coded as A74 given its atypical presentation.

Documentation should include the patient's signs and symptoms, medical history, diagnostic test results (e.g., NAAT, culture, serology) confirming Chlamydia trachomatis infection, and the specific site of infection. It's crucial to document why the infection doesn't classify under other chlamydial codes.

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