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ICD-10 Guide
ICD-10 CodesA56.19

A56.19

Other chlamydial genitourinary infection

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

Code Description

ICD-10 A56.19 is a billable code used to indicate a diagnosis of other chlamydial genitourinary infection.

Key Diagnostic Point:

A56.19 refers to other chlamydial genitourinary infections that are not classified under more specific codes. Chlamydia trachomatis is a common sexually transmitted infection (STI) that can lead to various genitourinary conditions, including urethritis, cervicitis, and pelvic inflammatory disease (PID). Symptoms may include abnormal discharge, dysuria, and pelvic pain, although many individuals remain asymptomatic. The infection can be transmitted through sexual contact and can affect both men and women. In women, untreated chlamydia can lead to serious reproductive health issues, including infertility. Diagnosis typically involves laboratory testing, such as nucleic acid amplification tests (NAATs). Treatment usually consists of antibiotics, with azithromycin or doxycycline being the most common choices. Contact tracing is crucial to prevent further transmission, as partners should be notified and tested. Regular screening is recommended for sexually active individuals, particularly those under 25 years of age or at higher risk for STIs.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of symptoms that may not be specific to chlamydia.
  • Need for accurate laboratory test results to confirm diagnosis.
  • Potential for co-infections with other STIs.
  • Variability in documentation practices among providers.

Audit Risk Factors

  • Inadequate documentation of symptoms and clinical findings.
  • Failure to document treatment plans and follow-up.
  • Lack of partner notification and contact tracing records.
  • Misclassification of the infection type.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, laboratory test results, treatment plans, and follow-up care.

Common Clinical Scenarios

Diagnosis and management of STIs, including chlamydia, in patients presenting with genitourinary symptoms.

Billing Considerations

Ensure that all relevant tests and treatments are documented to support the diagnosis.

Gynecology

Documentation Requirements

Comprehensive documentation of gynecological exams, patient history, and treatment protocols.

Common Clinical Scenarios

Routine screening and treatment of chlamydia in sexually active women, especially during annual exams.

Billing Considerations

Documenting the patient's sexual history and any counseling provided regarding STI prevention.

Coding Guidelines

Inclusion Criteria

Use A56.19 When
  • According to ICD
  • 10 guidelines, A56
  • 19 should be used when the specific type of chlamydial infection is not classified elsewhere
  • Coders should ensure that the documentation supports the diagnosis and that other related conditions are not coded instead

Exclusion Criteria

Do NOT use A56.19 When
No specific exclusions found.

Related CPT Codes

87491CPT Code

Chlamydia trachomatis, amplified probe technique

Clinical Scenario

Used for testing when chlamydia is suspected based on symptoms.

Documentation Requirements

Document the reason for testing and any symptoms present.

Specialty Considerations

Infectious disease specialists should ensure that testing aligns with clinical findings.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of chlamydial infections, improving data accuracy and facilitating better tracking of STIs. A56.19 provides a broader category for infections that do not fit into more specific classifications.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of chlamydial infections, improving data accuracy and facilitating better tracking of STIs. A56.19 provides a broader category for infections that do not fit into more specific classifications.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of chlamydial infections, improving data accuracy and facilitating better tracking of STIs. A56.19 provides a broader category for infections that do not fit into more specific classifications.

Resources

Clinical References

  • •
    CDC Chlamydia Fact Sheet

Coding & Billing References

  • •
    CDC Chlamydia Fact Sheet

Frequently Asked Questions

What are the common symptoms of chlamydial infections?

Common symptoms include abnormal discharge, dysuria, and pelvic pain. However, many individuals may be asymptomatic.

How is chlamydia treated?

Chlamydia is typically treated with antibiotics, such as azithromycin or doxycycline.

Why is contact tracing important?

Contact tracing helps prevent the spread of chlamydia by ensuring that sexual partners are tested and treated.

Who should be screened for chlamydia?

Sexually active individuals, particularly those under 25 or at higher risk for STIs, should be screened regularly.