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23070 T3, Total

T3, Total
Test Code: T3-A
Synonyms/Keywords
​​Triiodothyronine, T-3​, T3 Uptake, T3 Total​
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Serum​ Serum Separator Tube (SST)​ Red Top Tube (RTT)​ 1.0 mL​ 0.5 mL​ 0.3 mL​
Collection Processing Instructions
Samples collected in a RTT must be removed from the cells within one hour for storage or transport. Samples collected in gel barrier tubes must be removed from the primary tube prior to transporting to Marshfield. Do not send the primary collection tube.​
Specimen Stability Information
Specimen Type Temperature Time
Serum​ Refrigerated​ 7 days​
Frozen​ 2 months​
Rejection Criteria
​Grossly hemolyzed
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday Less than 2 hours
 Competitive Immunoassay using Direct Chemiluminescent Technology/Siemens Centaur
Reference Range Information
Performing Location Reference Range
Marshfield​
<1 month:      no reference range established
1-23 mos:      117-239 ng/dL
2-12 years:    105-207 ng/dL
13-20 years:  86-192 ng/dL
>20 years:     60-181 ng/dL
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84480   ​ ​ ​ ​ ​
Synonyms/Keywords
​​Triiodothyronine, T-3​, T3 Uptake, T3 Total​
Ordering Applications
Ordering Application Description
​Centricity ​T3, Total
​Cerner ​T3 total
​COM ​T3, Total
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
No​ Serum​ Serum Separator Tube (SST)​ Red Top Tube (RTT)​ 1.0 mL​ 0.5 mL​ 0.3 mL​
Collection Processing
Samples collected in a RTT must be removed from the cells within one hour for storage or transport. Samples collected in gel barrier tubes must be removed from the primary tube prior to transporting to Marshfield. Do not send the primary collection tube.​
Specimen Stability Information
Specimen Type Temperature Time
Serum​ Refrigerated​ 7 days​
Frozen​ 2 months​
Rejection Criteria
​Grossly hemolyzed
Reference Range Information
Performing Location Reference Range
Marshfield​
<1 month:      no reference range established
1-23 mos:      117-239 ng/dL
2-12 years:    105-207 ng/dL
13-20 years:  86-192 ng/dL
>20 years:     60-181 ng/dL
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Marshfield​ Monday through Sunday Less than 2 hours
 Competitive Immunoassay using Direct Chemiluminescent Technology/Siemens Centaur
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
84480   ​ ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.