T3, Free, Dialysis, LC/MS-MS

Understand what T3, Free, Dialysis, LC/MS-MS signals

Primary unit: pg/mL
LOINC codes: 29239-1, 3053-6
Commercial laboratory assays: 2

A triiodothyronine (T3) test measures the level of T3 in a sample of your blood. It's used to help diagnose thyroid disease.

Compare commercial laboratory assays for T3, Free, Dialysis, LC/MS-MS

Check orderable catalog codes, specimen types, fasting requirements, and demographic reference ranges across laboratories.

T3 Free, Tracer Dialysis

Laboratory: Quest Diagnostics
Test code: 36598
Specimen: Serum
Fasting: Not stated
LOINC: 29239-1, 3053-6
Turnaround: Set up: Sun-Thurs (p.m.); Report available: 5 days

Laboratory assay overview

T3 measurements are used to diagnose hyperthyroidism. This test can also be used to clarify thyroid status in the presence of possible protein-binding abnormalities.

Quest Diagnostics population reference ranges

Quest Diagnostics calculates these statistical intervals for this specific assay and demographic group, not as universal optimal targets.

Population	Range
1-9 Years	282-518 pg/dL
10-13 Years	286-556 pg/dL
14-17 Years	242-501 pg/dL
Adult	210-440 pg/dL
Pregnancy (all trimesters)	200-380 pg/dL
<1 Month	Not established
1-23 Months	117-239 ng/dL
2-12 Years	105-207 ng/dL
13-20 Years	86-192 ng/dL
>20 Years	76-181 ng/dL

View complete laboratory reference notes

Free T3 1-9 Years 282-518 pg/dL 10-13 Years 286-556 pg/dL 14-17 Years 242-501 pg/dL Adult 210-440 pg/dL Pregnancy (all trimesters) 200-380 pg/dL T3, Total <1 Month Not established 1-23 Months 117-239 ng/dL 2-12 Years 105-207 ng/dL 13-20 Years 86-192 ng/dL >20 Years 76-181 ng/dL

Quest Diagnostics test directory, test code 36598

Triiodothyronine (T3), Free, Dialysis and LC/MS-MS (Endocrine Sciences)

Laboratory: Labcorp
Test code: 503600
Specimen: Serum
Fasting: Not stated
Turnaround: 6 - 10 days

View complete laboratory reference notes

See table. Age Range (pg/mL) Mean (pg/mL) Premature (0 to 4 wk) 1.35−6.25 3.13 Newborn 0 to 2 wk 0.99−8.03 4.21 2 wk to 12 m 1.59−6.15 3.87 Prepubertal 1 to 10 y 2.21−4.99 3.60 Children >10 y and adults 1.81−4.06 2.77 Pregnant female first trimester 1.6−3.3 2.5 second trimester To be determined third trimester 1.0−3.2 2.1

Labcorp test directory, test code 503600

Verify these ranges and sources

We compile every detail above directly from named laboratory directories and published clinical studies. Laboratories calculate standard reference intervals from the statistical distribution of tested populations for a specific assay method and demographic group, rather than setting universal optimal targets.

Always review your personal lab results with a licensed clinician, or track your lab history and health goals in Aumnivida.

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