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ICD-10 Guide
ICD-10 CodesA56.0

A56.0

Chlamydia trachomatis genitourinary infection

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 A56.0 is a billable code used to indicate a diagnosis of chlamydia trachomatis genitourinary infection.

Key Diagnostic Point:

Chlamydia trachomatis is a common sexually transmitted infection (STI) that primarily affects the genitourinary tract. It is caused by the bacterium Chlamydia trachomatis and can lead to various complications if left untreated, including pelvic inflammatory disease (PID), infertility, and ectopic pregnancy in women. In men, it can cause urethritis and epididymitis. The infection is often asymptomatic, particularly in women, which contributes to its spread. Symptoms, when present, may include abnormal vaginal discharge, burning sensation during urination, and abdominal pain. Diagnosis is typically made through nucleic acid amplification tests (NAATs) or other laboratory tests. Treatment usually involves a course of antibiotics, such as azithromycin or doxycycline. Contact tracing is crucial for controlling the spread of chlamydia, as partners of infected individuals should also be tested and treated to prevent reinfection. Regular screening is recommended for sexually active individuals, especially those under 25 years of age or with multiple sexual partners.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Asymptomatic nature of the infection complicates diagnosis.
  • Need for accurate documentation of symptoms and test results.
  • Variability in treatment regimens based on patient history.
  • Importance of contact tracing and partner notification.

Audit Risk Factors

  • Inadequate documentation of symptoms.
  • Failure to document patient education on STI prevention.
  • Lack of follow-up care documentation.
  • Improper coding of co-infections.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, including sexual history and previous STIs.

Common Clinical Scenarios

Diagnosis and management of STIs, including chlamydia.

Billing Considerations

Ensure documentation reflects the asymptomatic nature and any complications.

Gynecology

Documentation Requirements

Documentation of pelvic exams, lab results, and treatment plans.

Common Clinical Scenarios

Routine screening and treatment of chlamydia in women.

Billing Considerations

Document any associated conditions like PID or infertility.

Coding Guidelines

Inclusion Criteria

Use A56.0 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the diagnosis and any related conditions
  • Include details on the patient's sexual history and any treatments provided

Exclusion Criteria

Do NOT use A56.0 When
No specific exclusions found.

Related CPT Codes

87491CPT Code

Chlamydia trachomatis test

Clinical Scenario

Used when testing for chlamydia in symptomatic or asymptomatic patients.

Documentation Requirements

Document the reason for testing and any symptoms present.

Specialty Considerations

Infectious disease specialists should ensure comprehensive STI screening.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of chlamydia infections, improving data accuracy and treatment tracking.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of chlamydia infections, improving data accuracy and treatment tracking.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of chlamydia infections, improving data accuracy and treatment tracking.

Resources

Clinical References

  • •
    CDC Chlamydia Fact Sheet

Coding & Billing References

  • •
    CDC Chlamydia Fact Sheet

Frequently Asked Questions

What are the common symptoms of chlamydia?

Many individuals with chlamydia are asymptomatic, but when symptoms occur, they may include abnormal discharge, burning during urination, and pelvic pain.

How is chlamydia treated?

Chlamydia is typically treated with antibiotics such as azithromycin or doxycycline. It's important for sexual partners to be treated as well.