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v1.0.0
ICD-10 Guide
DiagnosesRestrictive Lung Disease

Restrictive Lung Disease

ICD-10 Coding for Restrictive Lung Disease(J84.9, J98.4)

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

Diagnosis Overview

What is Restrictive Lung Disease?
Essential facts and insights about Restrictive Lung Disease

Key Clinical Considerations:

  • Dyspnea on exertion
  • Reduced lung volumes on spirometry
  • Hypoxemia

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history including symptoms and duration
  • Results of pulmonary function tests (PFTs)
  • Imaging studies (e.g., chest X-ray, CT scan) findings

Coding Guidelines

Usage Guidelines & Examples

  • Ensure correct use of ICD-10 codes for specific types of restrictive lung disease.
  • Common errors include misclassifying restrictive lung disease as obstructive.

Code Exclusions

Important Exclusions

  • Obstructive lung diseases such as COPD.
  • Alternative codes for specific conditions like asthma or pneumonia.

Related ICD-10 Codes

Primary Codes
J98.2
Other specified respiratory disorders
J84.10
Pulmonary fibrosis, unspecified
J43.9
Emphysema, unspecified
Differential Codes
J84.111
J84.9
J84.9
if fibrosis is present.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Pulmonology

Specialty Applications

  • Patients with interstitial lung disease, pulmonary fibrosis, or neuromuscular disorders.
  • Pulmonology clinics, hospitals, and outpatient settings.

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

Documentation requirements?

Include detailed patient history, PFT results, and imaging findings.

Billing considerations?

Ensure accurate coding to reflect the severity and type of restrictive lung disease.