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General Information
Test Name THYROID STIMULATING HORMONE REFLEX
Alias TSH
Performed 24 hrs.
Turn Around Time Med Emerg: 60 minutes; Routine: 2 hrs.
CPT Codes 84443
Performed By Lab Central
Notes
Clinical Utility Free T4 estimate will be performed if TSH value is <0.4 or >4.5 mcIU/mL. Total T3 and TU will be performed if FT4e is 0.8-1.8 ng/dL. Please note: TSH values may vary due to physiological effects of pregnancy. The variation is most notable during the firs
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Unacceptable Conditions

Components
Name Method Sex Age Range Ref. Range Low Ref. Range High Units
TSH Reflex All 0 minutes - 3 days 1 20 mcIU/mL
TSH Reflex All 3 days - 1 month 0.5 6.5 mcIU/mL
TSH Reflex All 1 month - 150 years 0.4 4.5 mcIU/mL

Specimen Requirements
Type Container Volume Units Collection / Delivery Storage / Transport Off Campus- Under Construction
Blood Red w/Gel, 5mL