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ICD-10 Guide
ICD-10 CodesA74.81

A74.81

Chlamydial peritonitis

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

Code Description

ICD-10 A74.81 is a billable code used to indicate a diagnosis of chlamydial peritonitis.

Key Diagnostic Point:

Chlamydial peritonitis is an inflammatory condition of the peritoneum caused by infection with Chlamydia trachomatis. This condition is often a complication of pelvic inflammatory disease (PID), which can arise from untreated urogenital chlamydial infections. Symptoms may include abdominal pain, fever, and signs of peritoneal irritation. Diagnosis typically involves a combination of clinical evaluation, imaging studies, and laboratory tests to confirm the presence of Chlamydia. Treatment usually consists of antibiotics, and early intervention is crucial to prevent further complications such as abscess formation or sepsis. The condition is more prevalent in sexually active women, particularly those under 25 years of age, and can lead to long-term reproductive health issues if not addressed promptly. Understanding the relationship between chlamydial infections and peritonitis is essential for effective management and coding of this condition.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between chlamydial peritonitis and other types of peritonitis.
  • Need for accurate documentation of the underlying chlamydial infection.
  • Potential for co-existing conditions that may complicate coding.
  • Variability in clinical presentation and diagnostic criteria.

Audit Risk Factors

  • Inadequate documentation of the diagnosis.
  • Failure to link the peritonitis to the underlying chlamydial infection.
  • Misclassification of the type of peritonitis.
  • Lack of supporting lab results in the medical record.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed history of the patient's chlamydial infection and treatment response.

Common Clinical Scenarios

Patients presenting with abdominal pain and a history of PID.

Billing Considerations

Ensure that all relevant lab results are documented to support the diagnosis.

Obstetrics and Gynecology

Documentation Requirements

Comprehensive documentation of pelvic examinations and any imaging studies performed.

Common Clinical Scenarios

Women with recurrent pelvic pain and a history of sexually transmitted infections.

Billing Considerations

Consideration of reproductive health implications and potential for future complications.

Coding Guidelines

Inclusion Criteria

Use A74.81 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation and laboratory findings
  • Include any relevant co
  • morbidities and complications in coding to provide a complete picture of the patient's health status

Exclusion Criteria

Do NOT use A74.81 When
No specific exclusions found.

Related CPT Codes

49000CPT Code

Exploratory laparotomy

Clinical Scenario

Used when surgical intervention is required to confirm diagnosis.

Documentation Requirements

Document indications for surgery and findings during the procedure.

Specialty Considerations

Ensure that the surgical necessity is clearly linked to the diagnosis of chlamydial peritonitis.

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, including peritonitis, which enhances the accuracy of data collection and reimbursement processes. This specificity aids in better tracking of disease prevalence and treatment outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of chlamydial infections, including peritonitis, which enhances the accuracy of data collection and reimbursement processes. This specificity aids in better tracking of disease prevalence and treatment outcomes.

Reimbursement & Billing Impact

reimbursement processes. This specificity aids in better tracking of disease prevalence and treatment outcomes.

Resources

Clinical References

  • •
    CDC Chlamydia Fact Sheet

Coding & Billing References

  • •
    CDC Chlamydia Fact Sheet

Frequently Asked Questions

What are the common symptoms of chlamydial peritonitis?

Common symptoms include abdominal pain, fever, nausea, vomiting, and signs of peritoneal irritation such as rebound tenderness.

How is chlamydial peritonitis diagnosed?

Diagnosis is made through clinical evaluation, imaging studies, and laboratory tests, including NAAT for Chlamydia.

What is the treatment for chlamydial peritonitis?

Treatment typically involves antibiotics, and in some cases, surgical intervention may be necessary.