Green (lithium heparin, gel) Alternate Containers: Green (lithium heparin, no gel), Green (lithium heparin, gel) on ICE, Red (no gel), Red or gold (gel)
Collection Volume
2.5 mL
Minimum Collection Volume
0.6 mL
Specimen Preparation
Separate from cells within 2 hours of collection for optimal results. Within 6 hours is also acceptable. Non-gel tubes: transfer serum/plasma to approved aliquot container. Optimal testing volume:1.25 mL serum/plasma; Minimum testing volume: 0.2 mL
Unacceptable Conditions
Gross hemolysis
Storage/Transport Temperature
Refrigerated
Stability (from collection to initiation)
After separation from cells:
Room temperature: 5 days
Refrigerated: 7 days
Frozen: 30 days, freeze once
Containers
Green (Lithium Heparin, Gel)
Alternate Containers
Green (Lithium Heparin, No Gel)
Green (Lithium Heparin, Gel) on ICE
Red (No Gel)
Red or Gold (Gel)
Reference Interval
Age
FT4 ng/dL
0-5 d
0.90-2.50
6 d - 2 mo
0.90-2.20
3-12 mo
0.90-2.00
1-5 y
1.00-1.80
6-10 y
1.00-1.70
11-19 y
1.00-1.60
20 y & older
0.90-1.70
Contraindications
Large doses of biotin (10 mg or more per day) may cause clinically significant interference in free T4 levels. If interference is suspected, it is strongly recommended that biotin is discontinued for at least one week prior to retesting.
CPT Disclaimer
The Current Procedural Terminology (CPT) Codes published in the M Health Fairview Test Directory are based on American Medical Association (AMA) guidelines and are provided for informational purposes only. CPT codes are provided only as guidance to assist clients with billing. CPT coding is the responsibility of the billing party. M Health Fairview Laboratories does not assume responsibility for billing errors due to reliance on the CPT codes listed in this Test Directory. Charges may vary due to reflexing, susceptibilities, specimen source, patient age, methodology requirements, etc..
Green (lithium heparin, gel) Alternate Containers: Green (lithium heparin, no gel), Green (lithium heparin, gel) on ICE, Red (no gel), Red or gold (gel)
Collection Volume
2.5 mL
Minimum Collection Volume
0.6 mL
Specimen Preparation
Separate from cells within 2 hours of collection for optimal results. Within 6 hours is also acceptable. Non-gel tubes: transfer serum/plasma to approved aliquot container. Optimal testing volume:1.25 mL serum/plasma; Minimum testing volume: 0.2 mL
Unacceptable Conditions
Gross hemolysis
Storage/Transport Temperature
Refrigerated
Stability (from collection to initiation)
After separation from cells:
Room temperature: 5 days
Refrigerated: 7 days
Frozen: 30 days, freeze once
Containers
Containers
Green (Lithium Heparin, Gel)
Alternate Containers
Green (Lithium Heparin, No Gel)
Green (Lithium Heparin, Gel) on ICE
Red (No Gel)
Red or Gold (Gel)
Result Interpretation
Reference Interval
Age
FT4 ng/dL
0-5 d
0.90-2.50
6 d - 2 mo
0.90-2.20
3-12 mo
0.90-2.00
1-5 y
1.00-1.80
6-10 y
1.00-1.70
11-19 y
1.00-1.60
20 y & older
0.90-1.70
Contraindications
Large doses of biotin (10 mg or more per day) may cause clinically significant interference in free T4 levels. If interference is suspected, it is strongly recommended that biotin is discontinued for at least one week prior to retesting.
Administrative
CPT Disclaimer
The Current Procedural Terminology (CPT) Codes published in the M Health Fairview Test Directory are based on American Medical Association (AMA) guidelines and are provided for informational purposes only. CPT codes are provided only as guidance to assist clients with billing. CPT coding is the responsibility of the billing party. M Health Fairview Laboratories does not assume responsibility for billing errors due to reliance on the CPT codes listed in this Test Directory. Charges may vary due to reflexing, susceptibilities, specimen source, patient age, methodology requirements, etc..
