2 mL serum. Allow SST to clot in an upright position for at least 30 minutes, then centrifuge sample within 2 hours of collection. Refrigerate. Do not collect samples from patients receiving therapy with high biotin doses (>5 mg/day) until at least 8 hours following the last biotin administration. For stat orders, please contact your local CPL Laboratory for local specimen requirements.
Alternate Specimen Requirements
2 mL serum from a plain red top tube. Allow sample to clot in an upright position for at least 60 minutes, then centrifuge sample and transfer serum to a plastic transport tube within 2 hours of collection. Clearly label tube as serum from a plain red top tube. Refrigerate. do not collect samples from patients receiving therapy with high biotin doses (>5 mg/day) until at least 8 hours following the last biotin administration. for stat orders, please contact your local cpl laboratory for local specimen requirements.
Minimum Volume
Adult: 0.5 mL Serum Pediatric: 0.2 mL Serum (Does Not Allow For Repeat or Additional testing).
Transport Temperature
Refrigerated
Rejection Criteria
Allow Only One Freeze/Thaw Cycle
Specimen Stability
8 Days Room Temperature 2 Weeks Refrigerated 2 Years Frozen
Synonyms
T3 Uptake
T Uptake
Tuptake
Thyroxine Binding Capacity
TBI
Reference Range
T-Uptake %: 24.30-39.00 Tbc: 0.80-1.30
Methodology
Roche Cobas Electrochemiluminescence Immunoassay (ECLIA) Note: Stat or Regional Laboratory testing may use different methodology and/or manufacturer. Note: Thyroxine Binding Capacity is inversely related to T-Uptake, decreased with Hyperthyroidism and Low Thyroid Binding Globulin (TBG), Increased In Hypothyroidism or with high TBG.
Test Setup Days Performed
Monday Through Friday PM Shift
Expected Turnaround Time
1 Day
CPT and LOINC
84479 Limited Coverage Test For Medicare. Advance Beneficiary Notice of Non-Coverage (ABN) Required If Diagnosis is Not Covered Frequency Limit Test For Medicare. Advance Beneficiary Notice of Non-Coverage (ABN) Always Required For Frequency. LOINC: T-Uptake % 74793-1 Tbc 74795-6
CPT Codes
84479 Limited Coverage Test For Medicare. Advance Beneficiary Notice of Non-Coverage (ABN) Required If Diagnosis is Not Covered Frequency Limit Test For Medicare. Advance Beneficiary Notice of Non-Coverage (ABN) Always Required For Frequency.
LOINC
3050-2
74795-6
Performing Lab
Clinical Pathology Laboratories Inc.
Ordering
Collect
Serum Separator Tube
Preferred Specimen Requirements
2 mL serum. Allow SST to clot in an upright position for at least 30 minutes, then centrifuge sample within 2 hours of collection. Refrigerate. Do not collect samples from patients receiving therapy with high biotin doses (>5 mg/day) until at least 8 hours following the last biotin administration. For stat orders, please contact your local CPL Laboratory for local specimen requirements.
Alternate Specimen Requirements
2 mL serum from a plain red top tube. Allow sample to clot in an upright position for at least 60 minutes, then centrifuge sample and transfer serum to a plastic transport tube within 2 hours of collection. Clearly label tube as serum from a plain red top tube. Refrigerate. do not collect samples from patients receiving therapy with high biotin doses (>5 mg/day) until at least 8 hours following the last biotin administration. for stat orders, please contact your local cpl laboratory for local specimen requirements.
Minimum Volume
Adult: 0.5 mL Serum Pediatric: 0.2 mL Serum (Does Not Allow For Repeat or Additional testing).
Transport Temperature
Refrigerated
Rejection Criteria
Allow Only One Freeze/Thaw Cycle
Specimen Stability
8 Days Room Temperature 2 Weeks Refrigerated 2 Years Frozen
Synonyms
T3 Uptake
T Uptake
Tuptake
Thyroxine Binding Capacity
TBI
Reference Range
Reference Range
T-Uptake %: 24.30-39.00 Tbc: 0.80-1.30
Profile Components
Methodology
Methodology
Roche Cobas Electrochemiluminescence Immunoassay (ECLIA) Note: Stat or Regional Laboratory testing may use different methodology and/or manufacturer. Note: Thyroxine Binding Capacity is inversely related to T-Uptake, decreased with Hyperthyroidism and Low Thyroid Binding Globulin (TBG), Increased In Hypothyroidism or with high TBG.
Test Setup Days Performed
Test Setup Days Performed
Monday Through Friday PM Shift
Expected Turnaround Time
1 Day
CPT and LOINC
CPT and LOINC
84479 Limited Coverage Test For Medicare. Advance Beneficiary Notice of Non-Coverage (ABN) Required If Diagnosis is Not Covered Frequency Limit Test For Medicare. Advance Beneficiary Notice of Non-Coverage (ABN) Always Required For Frequency. LOINC: T-Uptake % 74793-1 Tbc 74795-6
CPT Codes
84479 Limited Coverage Test For Medicare. Advance Beneficiary Notice of Non-Coverage (ABN) Required If Diagnosis is Not Covered Frequency Limit Test For Medicare. Advance Beneficiary Notice of Non-Coverage (ABN) Always Required For Frequency.
Serum Separator Tube