How to Bill CPT 74178 for Radiology and Diagnostic Imaging Services

When to Use CPT Code 74178

CPT 74178 is used for radiology or diagnostic imaging services performed to evaluate internal anatomy or physiological function.

• •Service type: Diagnostic imaging
• •Setting: Office, outpatient, or hospital
• •Components: Technical, professional, or global

Common scenarios:

• •Diagnostic evaluation of pain or injury
• •Monitoring disease progression
• •Ruling out acute conditions

Insurance Verification Tips for CPT 74178

1. •Verify prior authorization requirements.
2. •Confirm modifier usage (26, TC, or global).
3. •Check frequency and medical necessity rules.
4. •Ensure correct diagnosis code support.

Example Case of CPT 74178

A provider orders diagnostic imaging to evaluate the patient’s condition.
The imaging study is performed and billed as one unit of CPT 74178.