Sign in →

Test Code TSHF4 TSH W-FREE T4 REFLEX

Clinical Indications

N/A

Additional Test Codes

Epic Order Name: TSH with Free T4 Reflex
Sunquest Order Code: TSHF4
Epic Px Code: LAB2718

Specimen Collection Type

Preferred: Mint
Acceptable: Gold

Minimum Collection Volume

1.5 mL whole blood

Reference Range

TSH: 0.35-5.00 uU/mL
FRT4: 0.6-1.6 ng/dL

Critical Value

N/A

Interpretation

The Free T4 will automatically reflex when the TSH value is outside the reference range.

Rejection Criteria

N/A

Specimen Availability for Add-on Testing

2 Days

Specimen Stability

7 Days Refrigerated

Day(s) Performed

Monday through Sunday

Performing Lab- Department

TUKHS-BH-Chemistry

CPT Code

84443

LOINC Code

3016-3

Test Alias

N/A

Additional Information / Notes

Specimens collected in a serum gel tube or lithium heparin gel tube must be centrifuged within 3 hours of collection. Serum gel should clot for 30 minutes prior to being centrifuged.