Troponin-T, Cardiac

Cleveland HeartLab T, Test

CPT Code: 84484
Order Code: C2159
ABN Requirement:  No
Synonyms:  cTnT; Trop T; Cardiac-specific Troponin T
Volume: 1.0 mL
Minimum Volume: 0.3 mL
Specimen: Serum
Container: Gel-barrier tube (SST, Tiger Top)


  1. Collect and label sample according to standard protocols.
  2. Gently invert tube 5 times immediately after draw. DO NOT SHAKE.
  3. Allow blood to clot 30 minutes.
  4. Centrifuge for 10 minutes.
  5. Immediately aliquot serum into a transfer tube.
  6. Immediately freeze serum.

Special Shipping Instructions: Specimen needs to be shipped on dry ice. Failure to do so will result in the sample being rejected.

Special Information: Patients taking a biotin dose of up to 5 mg/day should refrain from taking biotin for 4 hours prior to sample collection. Patients taking a biotin dose of 5 to 10 mg/day should refrain from taking biotin for 8 hours prior to sample collection. Patients taking a biotin dose >10 mg/day should consult with their physician or the laboratory prior to having a sample taken. Clinicians should consider biotin interference as a source of error, when clinically suspicious of the laboratory result.

Transport/Shipping Instruction:  Store serum at -20°C after collection and ship the same day per packaging instructions provided with the Cleveland HeartLab shipping box.

  • Please note: Ship frozen serum on dry ice.


Ambient (15-25°C): 4 hours
Refrigerated (2-8°C): 24 hours
Frozen (-20°C): 12 months
Deep Frozen (-70°C): 12 months

Causes for Rejection: Hemolyzed samples; specimens other than frozen serum; improper labeling; samples not stored properly; samples older than stability limits

Methodology: Electrochemiluminescence Immunoassay (ECLIA)

Turn Around Time:  2-3 days

Reference Range:

 Age ng/mL
All Ages 0.000-0.029


Urgent Values:

  Age ng/mL
All Ages >0.029

Clinical Information: Evaluation of myocardial infarction.

The CPT codes provided 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 payer being billed.