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Troponin I

Test Code
TNIA


CPT Codes
84484

Preferred Specimen


1.0 mL plasma/1.0 mL serum




Transport Container
Green Top Tube/Gold Top tube


Transport Temperature
Refrigerated


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolyzed specimen


Methodology

Electrochemiluminescence Immunoassay



Reference Range
<0.30 ng/mL


Clinical Significance


Troponin is a protein complex which regulates the contraction of striated muscle. In acute coronary syndromes (ACS), it can be detected in blood at 4-8 hours following the onset of chest pain, has a peak concentration at 12-16 hours, and remains elevated for 5-9 days. ACS represents a continuum of increasing risk from asymptomatic coronary artery disease to myocardial ischemia and thrombus development. Patients with a very low troponin have a good short term prognosis. Troponin I has been used as a reliable marker in the diagnosis of perioperative myocardial infarction in patients undergoing cardiac surgery.






The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.