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ICD-10 Guide
ICD-10 CodesA63.8

A63.8

Other specified predominantly sexually transmitted diseases, not elsewhere classified

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

Code Description

ICD-10 A63.8 is a billable code used to indicate a diagnosis of other specified predominantly sexually transmitted diseases, not elsewhere classified.

Key Diagnostic Point:

A63.8 encompasses a variety of sexually transmitted diseases (STDs) that do not fall under more specific classifications. This code is used for infections that are primarily transmitted through sexual contact but are not classified under the more common STDs such as chlamydia, gonorrhea, syphilis, or HIV. Conditions that may be coded under A63.8 include infections caused by less common pathogens, atypical presentations of known STDs, or infections that may have a sexual transmission component but are not primarily classified as STDs. Clinicians must carefully document the specific nature of the infection, including symptoms, laboratory findings, and any relevant sexual history, to ensure accurate coding. Screening protocols for STDs often include urine tests, blood tests, and physical examinations, and it is crucial for healthcare providers to follow guidelines for screening high-risk populations to identify these infections early and provide appropriate treatment.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of conditions that can be classified under this code
  • Need for detailed clinical documentation to support the diagnosis
  • Potential overlap with other STD codes, requiring careful differentiation
  • Variability in clinical presentation and laboratory findings

Audit Risk Factors

  • Inadequate documentation of the specific infection
  • Failure to link symptoms to the diagnosis
  • Misclassification of the condition under a more specific code
  • Lack of supporting laboratory results

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, including sexual history, symptoms, and laboratory results.

Common Clinical Scenarios

Patients presenting with atypical STD symptoms or recurrent infections.

Billing Considerations

Consideration of co-infections and the need for comprehensive testing.

Urology

Documentation Requirements

Documentation of urogenital symptoms, diagnostic tests, and treatment plans.

Common Clinical Scenarios

Men presenting with urethritis or prostatitis with unclear etiology.

Billing Considerations

Differentiating between STDs and non-STD related urogenital infections.

Coding Guidelines

Inclusion Criteria

Use A63.8 When
  • According to ICD
  • 10 coding guidelines, A63
  • 8 should be used when a patient presents with a sexually transmitted disease that does not fit into a more specific category
  • Coders should ensure that the diagnosis is supported by clinical documentation and laboratory results

Exclusion Criteria

Do NOT use A63.8 When
No specific exclusions found.

Related CPT Codes

87491CPT Code

Infectious agent detection by nucleic acid (DNA or RNA); chlamydia trachomatis

Clinical Scenario

Used when testing for chlamydia in a patient with symptoms suggestive of an STD.

Documentation Requirements

Document the reason for testing and any relevant patient history.

Specialty Considerations

Infectious disease specialists may require additional details on patient history.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more detailed coding of STDs, including the ability to capture less common infections under A63.8. This has improved the specificity of data collection and reporting.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more detailed coding of STDs, including the ability to capture less common infections under A63.8. This has improved the specificity of data collection and reporting.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more detailed coding of STDs, including the ability to capture less common infections under A63.8. This has improved the specificity of data collection and reporting.

Resources

Clinical References

  • •
    CDC STD Treatment Guidelines

Coding & Billing References

  • •
    CDC STD Treatment Guidelines

Frequently Asked Questions

When should I use A63.8?

A63.8 should be used when a patient presents with a sexually transmitted disease that does not fit into a more specific category. Ensure that the diagnosis is well-documented.