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ICD-10 Guide
ICD-10 CodesA18.8

A18.8

Tuberculosis of other specified organs

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

Code Description

ICD-10 A18.8 is a used to indicate a diagnosis of tuberculosis of other specified organs.

Key Diagnostic Point:

Tuberculosis (TB) is a contagious bacterial infection caused by Mycobacterium tuberculosis, primarily affecting the lungs but can also involve other organs such as the kidneys, spine, and brain. Tuberculosis of other specified organs refers to cases where the infection has spread beyond the pulmonary system to other anatomical sites. Diagnosis typically involves a combination of clinical evaluation, imaging studies (such as chest X-rays or CT scans), and microbiological tests including sputum smear microscopy, culture, and molecular tests like PCR. Treatment usually consists of a multi-drug regimen over an extended period, often 6 to 12 months, depending on the site of infection and drug susceptibility. Monitoring for treatment adherence and potential side effects is crucial, as is managing any drug-resistant strains of TB. Public health implications are significant, as TB is a reportable disease, necessitating contact tracing and isolation procedures for infectious cases to prevent transmission. The complexity of coding for TB of other specified organs arises from the need for precise documentation of the affected organ, the presence of any co-morbid conditions, and the treatment regimen employed.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of affected organs leading to different clinical presentations.
  • Need for detailed documentation of diagnostic methods and treatment plans.
  • Potential for drug resistance complicating treatment and coding.
  • Public health reporting requirements and isolation protocols.

Audit Risk Factors

  • Inadequate documentation of the specific organ affected.
  • Failure to document drug resistance or treatment regimen.
  • Lack of clarity in diagnostic methods used.
  • Inconsistent reporting of public health measures taken.

Specialty Focus

Medical Specialties

Infectious Disease

Documentation Requirements

Detailed clinical notes on diagnostic tests, treatment plans, and follow-up care.

Common Clinical Scenarios

Patients presenting with extrapulmonary symptoms, such as renal or spinal pain.

Billing Considerations

Need for comprehensive documentation of drug susceptibility testing and treatment adherence.

Pulmonology

Documentation Requirements

Thorough pulmonary assessments and imaging results.

Common Clinical Scenarios

Patients with concurrent pulmonary and extrapulmonary TB.

Billing Considerations

Coordination with infectious disease specialists for comprehensive care.

Coding Guidelines

Inclusion Criteria

Use A18.8 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the specific organ affected by tuberculosis
  • Include any relevant co
  • morbidities and treatment details

Exclusion Criteria

Do NOT use A18.8 When
  • Exclude cases of latent TB infection unless there is evidence of active disease

Related CPT Codes

86580CPT Code

Tuberculosis skin test (TST)

Clinical Scenario

Used for screening in patients with suspected TB.

Documentation Requirements

Document the reason for testing and results.

Specialty Considerations

Infectious disease specialists may require additional follow-up testing.

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, improving data accuracy and public health tracking. A18.8 provides granularity in coding for extrapulmonary TB, which was less detailed in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of tuberculosis cases, improving data accuracy and public health tracking. A18.8 provides granularity in coding for extrapulmonary TB, which was less detailed in ICD-9.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of tuberculosis cases, improving data accuracy and public health tracking. A18.8 provides granularity in coding for extrapulmonary TB, which was less detailed in ICD-9.

Resources

Clinical References

  • •
    CDC Tuberculosis (TB) Information

Coding & Billing References

  • •
    CDC Tuberculosis (TB) Information

Frequently Asked Questions

What are the common symptoms of tuberculosis of other specified organs?

Symptoms can vary widely depending on the organ involved but may include pain, swelling, fever, and systemic symptoms like weight loss and fatigue. Specific symptoms may relate to the organ affected, such as renal pain for kidney involvement or neurological symptoms for CNS involvement.

How is tuberculosis of other specified organs diagnosed?

Diagnosis typically involves a combination of clinical evaluation, imaging studies (like X-rays or CT scans), and microbiological tests such as sputum cultures or biopsies from the affected organ.

What are the treatment options for tuberculosis of other specified organs?

Treatment usually involves a multi-drug regimen that may include isoniazid, rifampin, ethambutol, and pyrazinamide, tailored based on drug susceptibility testing.

What public health measures are required for tuberculosis cases?

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