Triiodothyronine, Free

Last Modified: 1/31/2022 1:38:17 PM


Medical Necessity Documentation:  
Client Notes:  
Patient Preparation:

Patient should discontinue taking Biotin, Vitamin B7, or Vitamin H 48 hours before getting blood drawn.
Specimen Requirements:

1.0 mL Serum in a SST Gold Top Tube
Collection Instructions:  
Minimum Volume: 0.2 mL Serum
Transport & Storage: Temperature/Stability: 7 days Refrigerated
Reference Range: 2.3 - 4.2 pg/mL
Critical Ranges:  
Test Comments: Patients taking vitamin supplements containing high doses of biotin (>5 mg/day) may have falsely increased test results generated.
Methodology: Chemiluminescence
Clinical Significance:  
Documentation:  
Custom Panel: No

PRODUCTION SCHEDULE

Days Performed: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
Sites Performed: Parkview Regional Medical Center
PHL Test Code: T3FR1
EPIC Test Code: LAB137
Alternate Test Names: Free T3; FT3; T3, Free
Included Tests:  
CPT Coding: 84481

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