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Thyroid Function Tests

Normal Laboratory Values

Test	Abbreviation	Typical Ranges
Serum thyroxine	T4	4.6-12 ug/dl
Free thyroxine fraction	FT4F	0.03-0.005%
Free Thyroxine	FT4	0.7-1.9 ng/dl
Thyroid hormone binding ratio	THBR	0.9-1.1
Free Thyroxine index	FT4I	4-11
Serum Triiodothyronine	T3	80-180 ng/dl
Free Triiodothyronine l	FT3	230-619 pg/d
Free T3 Index	FT3I	80-180
Radioactive iodine uptake	RAIU	10-30%
Serum thyrotropin	TSH	0.5-6 uU/ml
Thyroxine-binding globulin	TBG	12-20 ug/dl T4 +1.8 ugm
TRH stimulation test Peak	TSH	9-30 uIU/ml at 20-30 min
Serum thyroglobulin l	Tg	0-30 ng/m
Thyroid microsomal antibody titer	TMAb	Varies with method
Thyroglobulin antibody titer	TgAb	Varies with method

Updated on: 10/13/10

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Thyroid Function Tests

Normal Laboratory Values

Thyroid Gland Basics

Thyroid Disorders

Thyroid Resources

Patient Guides

Diabetes Guide for Older People

Patient Guide to Diabetic Neuropathy

Patient Guide to Treating High Cholesterol and Diabetes

Patient Guide to Insulin

Patient Guide to Osteoporosis Prevention

Patient Guide to Easy Diabetic Recipes

Thyroid Cancer Guide

Patient Guide to Managing Your Child's Type 1 Diabetes

Resources

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Vertical Health Websites

Thyroid Function Tests

Normal Laboratory Values

Thyroid Gland Basics

Thyroid Disorders

Thyroid Resources

Patient Guides

Resources

Policy and Contact

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