NEW YORK DOH APPROVED: YES
CPT Code: 84436Order Code: 867
ABN Requirement: No
Synonyms: Total T4; T4
Specimen: Serum
Volume: 1.0 mL
Minimum Volume: 0.5 mL
Container: Gel-barrier tube (SST, Tiger Top)
Transport: Store serum at 2°C to 8°C after collection and ship the same day per packaging instructions provided with the Cleveland HeartLab shipping box.
Stability:
Ambient (15-25°C): 7 days
Refrigerated (2-8°C): 7 days
Frozen (-20°C): 28 days
Methodology: Immunoassay
Turn Around Time: 1 to 5 days
Reference Range:
| Male (mcg/dL) | Female (mcg/dL) | |
| <1 Month | 4.5-17.2 | 4.5-17.2 |
| 1-23 Months | 5.9-13.9 | 5.9-13.9 |
| 2-12 Years | 5.7-11.6 | 5.7-11.6 |
| 13-20 Years | 5.1-10.3 | 5.3-11.7 |
| >20 Years | 4.9-10.5 | 5.1-11.9 |
Clinical Significance: For the diagnosis of hypothyroidism and hyperthyroidism
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.