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Available Tests

  • Thyroid Stimulating Hormone (TSH)

Thyroid Stimulating Hormone (TSH)

Tube Type

Test ID LAB129
EPIC Order
CPT Code(s) 84443
Group/Individual Test Individual
Laboratory Core Laboratory
Tube Station Routine: 30; STAT: 888
Specimen Routine: 4 mL blood/serum separator tube/gold top/red top acceptable
Micro: 0.9 mL blood/gold or red top bullet; formulary = 0.90mL
Unspun: 8 hours
Room Temperature: Yes
Refrigerator: 7 days
Frozen: 4 weeks
Availability Routine: 24 hrs/day
Turnaround Time 2 hrs
Reference Range Normal: see Table below for other populations.
Internal Reference Testing Specimen Handling Instructions: Centrifuge, Aliquot, Refrigerate
Comments For additional specimen information refer to Core Laboratory Memorandum #46
TSH Reference Ranges (µIU/mL) (effective 1/25/2005)
Pediatric patients1 0 - 3 d 1-20
3 - 30 d 0.5-6.5
31 d - 5 m 0.5-6.0
6 m - 18 y 0.5-4.5
Adults, ambulatory, healthy2 >18 y 0.60-3.30
Pregnant, euthyroid patients3 In general, levels trend higher throughout pregnancy
First trimester ~111% of ref mean
Second trimester 106-122% of ref mean
Third trimester 111-132% of ref mean

1. Dugaw KA, Jack RM, Rutledge J Pediatric reference ranges for TSH, free T4, total T4 total T3 and T3 Uptake on the Vitros ECi analyzer. Clin Chem 201; 47: A108.
2. Reference range determined in-house
3. Lockitch G. Handbook of Diagnostic Biochemistry and Hematology in Normal Pregnancy. CRC Press. 1993.

Reviewed by gloria_crawford on January 30, 2017

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514