CPT code 84484: Troponin, quantitative assay2026 Medicare lab fee · Clinical Laboratory Fee Schedule
A quantitative blood test measuring troponin, reported when evaluating suspected or known heart muscle injury, including acute coronary events.
Medicare pays $12.47 for 84484 under the 2026 Clinical Laboratory Fee Schedule: one national amount, the same in every state and setting.
Medicare lab fee · CLFS 2026 Q4
National CLFS amount
$12.47
In effect since Jan 1, 2026. The same amount in every state, payment locality and setting.
- Geographic adjustment
- None
- Office vs facility
- Same
- Since 2020
- Unchanged
- CMS updates
- Quarterly
Medicare pays the lesser of the lab’s charge and this amount. Patients usually owe no Part B deductible or coinsurance for covered clinical lab tests.
On this page 8 sections
What 84484 covers
This laboratory assay measures the amount of troponin, a protein released into the blood when heart muscle is injured. It is commonly ordered in emergency departments and hospitals when patients have symptoms concerning for acute coronary syndrome, and may be repeated to assess changes over time. Laboratories perform the assay on a blood specimen, typically serum or plasma; testing may measure cardiac troponin I or T and may use a high-sensitivity method.
Report 84484 for quantitative troponin testing. For serial testing, document each collection and result. Medicare pays the test through the CLFS, with one national amount applying across states and localities and no office or facility payment difference. The 2026 national CLFS amount is $12.47, unchanged since 2020. The test is paid only through the CLFS.
This summary was written with AI assistance from CMS Clinical Laboratory Fee Schedule data. Amounts on this page come directly from CMS files.
How Medicare pays 84484
Clinical lab tests aren’t priced like physician services. They’re paid from their own fee schedule, with its own rules. See the whole lab fee schedule.
One national amount
CMS sets a single Clinical Laboratory Fee Schedule amount for 84484. There’s no geographic (GPCI) adjustment, so it pays the same in every state and payment locality.
No office or facility rate
Lab tests aren’t built from relative value units, so there’s no office and facility split: the place of service doesn’t change the CLFS amount.
Updated every quarter
CMS republishes the CLFS each quarter. New tests, often proprietary laboratory analyses (PLA codes), join during the year; existing amounts are updated each January.
Excluded from the physician fee schedule
The physician fee schedule lists 84484 with status X (excluded by statute), so the test itself is paid only from the CLFS.
84484 on the lab fee schedule since 2020
84484 · CLFS 2026 Q4 (current)
$12.47
Unchanged since Jan 1, 2020
27 quarterly CLFS releases on file, first CLFS 2020 Q1. A code missing from a quarter wasn’t on that release.
84484 compared with similar tests
- 82553CK-MB testMB fraction only$11.55
- 82553 measures the CK-MB fraction of creatine kinase. Use 84484 for a quantitative troponin result.
- 82550Total CKTotal enzyme activity$6.51
- 82550 measures total creatine kinase, not troponin. The tests assess different blood markers.
- 83874MyoglobinMuscle protein level$12.92
- 83874 measures myoglobin. It is not a troponin assay, even when both tests are used to assess possible cardiac injury.
84484 billing questions
When should 84484 be selected?
Use it for a quantitative troponin assay ordered to assess heart muscle injury, such as during evaluation of suspected acute coronary syndrome. It measures troponin rather than CK, CK-MB, or myoglobin.
What should documentation show for serial troponin testing?
Document each collection and its result when testing is repeated over time.
Is modifier 26 used with 84484?
No. Medicare pays 84484 only through the CLFS; it is not a separately paid physician interpretation service.
How does Medicare pay for 84484?
Medicare pays one national CLFS amount per code across states and localities, with no office or facility payment difference.
Does 84484 include an ECG?
No. The code reports the laboratory measurement of troponin; an ECG is a separate service when performed and reported.
Where this amount comes from
FeeBase reads lab amounts directly from the CMS Clinical Laboratory Fee Schedule file for the quarter: one row per code, with its payment indicator and national amount. Contractor-priced tests are labeled, never given a made-up amount. Amounts are Medicare payment limits, not a patient’s bill or a commercial rate.
CMS CLFS 2026 Q4 · effective Oct 1, 2026 through the day before Jan 1, 2027
Show the CMS file line behind this amount
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