| Category | Amount |
|---|---|
| Medicare Allowed Rate What Medicare approves for this service | $241.67 |
| Typical Billed Amount What providers commonly charge | $500 – $2800 |
| Potential Markup How much more you might pay vs. Medicare rate | 1059% above Medicare |
What CPT Code 73721 Means
When you see CPT code 73721 on your medical bill, it means you received an MRI (magnetic resonance imaging) scan of a lower extremity joint - typically your knee or ankle - without contrast material. This is a non-invasive imaging test that uses magnetic fields and radio waves to create detailed pictures of your joint, muscles, ligaments, and surrounding tissues.
Doctors commonly order this test when you have knee or ankle pain, swelling, or injury. It helps them see torn ligaments, damaged cartilage, fractures, or other problems that might not show up on regular X-rays. The scan usually takes 30-60 minutes, and you'll lie still on a table that slides into the MRI machine.
This particular code (73721) specifically refers to MRI scans done without contrast dye. If your doctor needed to inject contrast material to get clearer images, that would be billed under a different code.
Understanding the Costs and Your Bill
The cost for CPT code 73721 varies significantly depending on where you have the scan done. Typical charges range from $500 to $2,800, with hospital-based imaging centers usually charging more than independent radiology clinics. Medicare reimburses this service at $241.67, which gives you an idea of the baseline cost.
On your bill, you'll see CPT code 73721 listed along with the facility charge. You might also see separate charges for the radiologist who reads your scan - this is normal and expected. Some bills will show the description as "MRI lower extremity joint without contrast" while others might use simpler language like "knee MRI" or "ankle MRI."
Your out-of-pocket cost depends on your insurance coverage. If you have a high-deductible plan, you might pay the full amount until you meet your deductible. With traditional insurance, you'll typically pay a copay or coinsurance percentage after your insurance processes the claim.
How to Verify Your Bill is Correct
To check if you were billed correctly for CPT code 73721, first confirm that you actually received an MRI of your knee or ankle without contrast. If you received contrast dye during your scan, the code should be 73722 instead. Also make sure the body part matches - if you had a hip or shoulder MRI, different codes would apply.
Compare the charges on your bill to typical ranges in your area. If you're being charged significantly more than $2,800, or if the amount seems unusually high compared to other local providers, it's worth questioning. You can call other imaging centers in your area to compare prices, especially if you're paying out-of-pocket.
If you believe there's an error, contact the billing department of the facility where you had your MRI. Ask them to explain the charges and verify that CPT code 73721 is correct for your specific scan. If you're still concerned, contact your insurance company to review the claim, or consider getting help from a patient advocate or medical billing professional.