Radiology Coding Alert

Question: How should I code a bilateral hip MRI? Should I use a pelvis code?

Arizona Subscriber

Answer: For a hip MRI, choose from 73721-73723 (Magnetic resonance [e.g., proton] imaging, any joint of lower extremity ...), depending on contrast use, states CPT Assistant (June 2006).

The way you identify the service as bilateral will depend on the payer's preference. CPT Assistant states that any one of the following may be appropriate:

• List the appropriate code twice on the claim.

• Append modifiers LT (Left side) and RT (Right side).

• Report a single-line item and report 2 units.

CPT Assistant indicates that use of modifier 50 (Bilateral procedure) is not appropriate for bilateral radiology procedures.