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v1.0.0
ICD-10 Guide
DiagnosesLatent Tuberculosis

Latent Tuberculosis

ICD-10 Coding for Latent Tuberculosis(Z22.7, Z11.7)

PRIMARY SPECIALTYInfectious Disease
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Latent Tuberculosis?
Essential facts and insights about Latent Tuberculosis

Key Clinical Considerations:

  • Asymptomatic individuals with a positive tuberculin skin test or interferon-gamma release assay (IGRA)
  • Positive tuberculin skin test (TST) or IGRA results without clinical symptoms of active TB
  • Normal physical examination findings, often with no respiratory symptoms

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history of exposure to TB, TST/IGRA results, and absence of active disease symptoms
  • Use of terms like 'latent tuberculosis infection (LTBI)' or 'tuberculosis, latent'
  • Example: 'Patient has a positive TST with no clinical signs of active TB and is asymptomatic.'

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for distinguishing between latent and active TB to avoid miscoding.
  • Common errors include using active TB codes for patients with latent TB.

Code Exclusions

Important Exclusions

  • Active tuberculosis disease (A15-A19 codes)
  • Conditions that mimic TB symptoms but are not TB-related.

Related ICD-10 Codes

Primary Codes
Z11.1
Encounter for screening for tuberculosis
Z22.7
Carrier of tuberculosis
A16.1
Latent tuberculosis infection
Ancillary Codes
Z86.15
Differential Codes
R76.11
Z11.1

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Infectious Disease

Specialty Applications

  • Individuals with known exposure to TB, immunocompromised patients, and healthcare workers.
  • Outpatient infectious disease clinics, primary care settings, and public health screenings.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What are the documentation requirements?

Document positive TST/IGRA results, patient history, and absence of active TB symptoms.

What are the billing considerations?

Ensure correct ICD codes are used and document all relevant patient history for insurance claims.