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v1.0.0
ICD-10 Guide
DiagnosesAbnormal Chest Computed Tomography

Abnormal Chest Computed Tomography

ICD-10 Coding for Abnormal Chest CT(R93.1, R93.89)

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

Diagnosis Overview

What is Abnormal Chest Computed Tomography?
Essential facts and insights about Abnormal Chest CT

Key Clinical Considerations:

  • Presence of abnormal findings in chest CT scan
  • Clinical signs and symptoms that prompted the CT scan such as persistent cough, chest pain, shortness of breath

Clinical Information

Clinical Criteria & Documentation Requirements

  • Detailed description of the abnormal findings in the chest CT scan
  • Clinical reason for the CT scan
  • Patient's symptoms and history

Coding Guidelines

Usage Guidelines & Examples

  • R93.1 is used for abnormal findings on diagnostic imaging of lung specifically
  • R93.89 is used for abnormal findings on diagnostic imaging of other specified body structures

Code Exclusions

Important Exclusions

  • Normal findings on diagnostic imaging of lung (R93.0)
  • Abnormal findings on diagnostic imaging of heart and coronary circulation (R93.2)

Related ICD-10 Codes

Primary Codes
R93.1
Abnormal findings on diagnostic imaging of lung
R93.89
Abnormal findings on diagnostic imaging of other specified body structures
Ancillary Codes
J98.4
Differential Codes
R91.8
R91.8
for diffuse or nonspecific abnormalities like ground-glass opacities.
R93.1
R93.1
for lung-specific findings.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Radiology

Specialty Applications

  • Patients with abnormal chest CT scan findings
  • Patients presenting with symptoms of lung disease or chest pathology

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

Template 1

Patient presented with [symptoms]. Chest CT scan revealed [specific abnormal findings].

Template 2

Chest CT scan performed due to [clinical reason]. Abnormal findings include [specific findings].

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

Can these codes be used for incidental findings?

Yes, these codes can be used for incidental findings on a chest CT scan that are not related to the patient's current illness.

When should this code be used?

These codes should be used when there are abnormal findings on a chest CT scan, regardless of the presence of symptoms.