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73721

MRI Lower Extremity Joint Without Contrast

Code Description

CPT code 73721 is used to report an MRI of a lower extremity joint performed without contrast material. The code may apply to MRI evaluation of lower-extremity joints such as the hip, knee, or ankle, depending on the anatomical area examined and documented.

MRI provides detailed images of bones, cartilage, ligaments, tendons, muscles, and other soft tissues surrounding the joint. The examination is commonly used to evaluate injuries, degenerative conditions, and other abnormalities when detailed soft-tissue imaging is needed.

When to Use 73721

Common examples include:

  • Suspected ligament injury

  • Meniscus injury

  • Joint pain or swelling

  • Cartilage damage

  • Tendon or soft-tissue injury

  • Degenerative joint changes

  • Evaluation following traumatic injury

Documentation Requirements

Documentation should include:

  • Reason for the examination

  • Specific lower extremity joint examined

  • Confirmation that no contrast was administered

  • Relevant symptoms or diagnosis

  • Physician or radiologist interpretation

  • Diagnostic findings

Common Billing Mistakes

Common billing mistakes include:

  • Failing to identify the specific joint examined

  • Reporting 73721 when contrast was administered

  • Selecting a non-joint MRI code for a joint examination

  • Incorrect use of Modifier 26 or TC

  • Insufficient documentation supporting medical necessity

Related CPT Codes
72148

Lumbar Spine MRI Without Contrast

70450

CT Head Without Contrast

71260

CT Chest With Contrast

FAQ

What does CPT code 73721 cover?

CPT code 73721 reports MRI of a lower extremity joint performed without contrast material.

What joints can CPT 73721 apply to?

The code may apply to MRI examinations of lower extremity joints such as the hip, knee, or ankle. The medical record should clearly identify the specific joint examined.

Does CPT 73721 include contrast?

No. CPT 73721 is used for an MRI of a lower extremity joint performed without contrast material.

Can Modifier 26 be used with CPT 73721?

Modifier 26 may be used when the provider bills only for the professional component, such as interpreting the MRI and preparing the written report.

Procedure Type

Magnetic Resonance Imaging (MRI)

Body Area

Contrast

Lower Extremity Joint

Without Contrast