CPT 84484
Troponin (heart muscle damage test)
A blood test for troponin, the protein released when heart muscle is damaged. It is the central test for chest pain in the ER and is usually run at least twice, a few hours apart, to see whether the level is changing.
Billed to Medicare
$48
What providers submitted, on average, for this code in a hospital setting.
Medicare accepted
$12
What Medicare treated as payable. Not a commercial rate or a cash price.
The gap
3.9x
How many times the accepted amount the billed figure was.
National averages from the Centers for Medicare & Medicaid Services, 2024 data, retrieved 2026-09-14. Medicare fee-for-service, physician and practitioner claims only. The hospital's own charge for the same code is separate and is usually higher. Based on 28 services.
Among the 10 lab tests codes on this site with CMS figures, this gap ranks 5 of 10 (median 3.7x). The widest is Urinalysis, automated with microscopy at 5.5x.
Where this line goes wrong
Two or three is normal, more is not
Serial troponins at 0, 3 and 6 hours are standard. Five or six on one visit is unusual and worth matching to the results.
The ECG comes with it
A chest pain work-up normally includes an ECG (93000 or 93005 plus 93010). Check those lines are not duplicated between the hospital and the physician bills.
Want to know if this line is right on your own bill? Upload it to a free mediloop account. An automatic first look reads the charges and shows what looks worth questioning, usually in about a minute.
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- 1
Ask for the itemized bill and the lab results and match every billed test to a result.
- 2
Check for a panel billed alongside one of its own components, or two overlapping panels on the same draw.
- 3
Count the blood draw (36415) lines; one per visit is the norm.
- 4
If self-pay, ask for the hospital's cash price for each test, or compare with an independent lab's published price.
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Codes that travel with this one
People also ask
Why was I tested for a heart attack twice?
Because a single normal troponin cannot rule one out; the test is repeated to see whether the level rises. Two or three tests is the standard protocol.
Sources
This page explains a billing code in general terms. It is not a coding, legal or medical opinion about your bill, and the code descriptions are mediloop's own plain-English summaries, not the official CPT descriptors, which are owned by the American Medical Association. Whether a charge was correct depends on the record of your visit and your payer's rules.