T4, Total

Test Code

LAB126

CPT Codes
84436

Instructions

"Routine venipuncture
Collect one 5ml Red/gold top serum separator tube"

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

Moderate hemolysis or lipemia; failure to follow proper collection or storage procedures

Methodology
Competitive immunoassay: The amount of HRP conjugate bound is indirectly proportional to the concentration of T4 present.

Setup Schedule

Daily/Stat

Report Available

Within 24 hours

Reference Range

"Age:0 Days - 6 days: 11.00 - 21.50 ug/dL7 Days - 4 Weeks: 8.20 - 16.60 ug/dL2 Month - 1 year: 7.20 - 15.60 ug/dL2 Year - 5 year: 7.30 - 15.00 ug/dL6 Year - 10 Year: 6.40 - 13.30 ug/dL11 Year - 15 year: 5.60 - 11.70 ug/dL16 Year - Adult: 5.53 - 11.00 ug/dL
Critical Values: Less than 2.99 or Greater than 25.01 for any age"

Additional Information
NCD-ABN_Thyroid_Testing

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.