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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
Unspun: 8 hours
Spun/separated, Room Temperature- 8 hours
Spun/separated, Refrigerator: 7 days
Spun/separated, Frozen: 4 weeks
Availability Routine: 24 hrs/day
Turnaround Time 2 hrs
Reference Range Normal: see Table below for other populations.
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.

  Testing is performed using OrthoClinical Diagnostics TSH Immunoassay.  Different test methods should not be used interchangeably.  Heterophilic antibodies may cause interference.  High doses of biotin may cause test interference.  

Reviewed by jcarr on December 16, 2019

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