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v1.0.0
ICD-10 Guide
ICD-10 CodesA18.39

A18.39

Retroperitoneal tuberculosis

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

Code Description

ICD-10 A18.39 is a billable code used to indicate a diagnosis of retroperitoneal tuberculosis.

Key Diagnostic Point:

Retroperitoneal tuberculosis is a rare form of extrapulmonary tuberculosis that occurs in the retroperitoneal space, which is the area behind the peritoneum that contains the kidneys, ureters, adrenal glands, aorta, inferior vena cava, and other structures. This condition typically arises from hematogenous spread of Mycobacterium tuberculosis from a primary pulmonary infection or from direct extension from adjacent infected structures. Patients may present with nonspecific symptoms such as abdominal pain, weight loss, fever, and night sweats. Diagnosis often involves imaging studies like CT scans or MRI, which can reveal lymphadenopathy or abscess formation in the retroperitoneal area. Sputum tests, chest X-rays, and tuberculin skin tests may also be utilized to confirm the diagnosis of tuberculosis. Treatment usually involves a prolonged course of antitubercular medications, including isoniazid, rifampicin, ethambutol, and pyrazinamide, for at least six months. Monitoring for drug resistance is critical, as multidrug-resistant tuberculosis can complicate treatment. Public health implications are significant, as retroperitoneal tuberculosis can indicate a more widespread infection, necessitating contact tracing and isolation procedures to prevent transmission.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Rarity of the condition makes it less familiar to coders.
  • Potential for misdiagnosis with other abdominal conditions.
  • Need for comprehensive documentation of diagnostic methods.
  • Variability in treatment regimens based on drug resistance.

Audit Risk Factors

  • Inadequate documentation of diagnostic imaging results.
  • Failure to document the patient's history of pulmonary tuberculosis.
  • Lack of clarity in treatment plans and follow-up care.
  • Insufficient details on public health reporting and contact tracing.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed patient history, diagnostic imaging reports, treatment plans, and follow-up notes.

Common Clinical Scenarios

Patients presenting with abdominal pain and a history of tuberculosis.

Billing Considerations

Awareness of drug resistance patterns and public health implications.

Radiology

Documentation Requirements

Comprehensive imaging reports detailing findings in the retroperitoneal space.

Common Clinical Scenarios

CT or MRI scans showing lymphadenopathy or abscesses.

Billing Considerations

Need for correlation with clinical findings and laboratory results.

Coding Guidelines

Inclusion Criteria

Use A18.39 When
  • According to ICD
  • 10 coding guidelines, A18
  • 39 should be used when retroperitoneal tuberculosis is confirmed through diagnostic imaging or laboratory tests
  • It is essential to document the specific site of infection and any related complications

Exclusion Criteria

Do NOT use A18.39 When
No specific exclusions found.

Related CPT Codes

71045CPT Code

Chest X-ray, 2 views

Clinical Scenario

Used to evaluate for pulmonary involvement in a patient with suspected retroperitoneal tuberculosis.

Documentation Requirements

Document the indication for the chest X-ray and any findings.

Specialty Considerations

Radiologists should correlate findings with clinical history.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of tuberculosis cases, including retroperitoneal tuberculosis, which enhances data accuracy and improves tracking of disease prevalence and treatment outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of tuberculosis cases, including retroperitoneal tuberculosis, which enhances data accuracy and improves tracking of disease prevalence and treatment outcomes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of tuberculosis cases, including retroperitoneal tuberculosis, which enhances data accuracy and improves tracking of disease prevalence and treatment outcomes.

Resources

Clinical References

  • •
    CDC Tuberculosis Guidelines

Coding & Billing References

  • •
    CDC Tuberculosis Guidelines

Frequently Asked Questions

What are the common symptoms of retroperitoneal tuberculosis?

Common symptoms include abdominal pain, weight loss, fever, and night sweats. However, symptoms can be nonspecific, making diagnosis challenging.

How is retroperitoneal tuberculosis diagnosed?

Diagnosis typically involves imaging studies such as CT or MRI, along with microbiological tests like sputum cultures and tuberculin skin tests.

What is the treatment for retroperitoneal tuberculosis?

Treatment usually consists of a combination of antitubercular medications for at least six months, with monitoring for drug resistance.

What public health measures are necessary for retroperitoneal tuberculosis?

Public health measures include contact tracing, isolation of infectious patients, and reporting to health authorities.