Lab Tests Beginning With I

8 tests in the Lab Values reference begin with the letter I. Every name links to a page with its typical adult range in both unit systems, plain-language notes on high and low results, and preparation notes where they apply.

A B C D E F G H I L M N NUMBERS O P R S T U V W Z

Test	Abbr.	Typical range (conventional)	Typical range (SI)
Immature Granulocytes %	IG%	0–0.5 %	0–0.5 %
Insulin, Fasting	—	2.6–24.9 µIU/mL	18–173 pmol/L
Insulin-Like Growth Factor 1	IGF-1	100–300 ng/mL	100–300 ng/mL
Interleukin-6	IL-6	<7 pg/mL	<7 pg/mL
International Normalized Ratio	INR	0.9–1.2 ratio	0.9–1.2 ratio
Ionized Calcium	iCa	4.5–5.3 mg/dL	1.12–1.32 mmol/L
Iron, Serum	—	Male 65–175; Female 50–170 µg/dL	Male 11.6–31.3; Female 9.0–30.4 µmol/L
Islet Autoantibodies	—	Negative	—

Please note: Reference ranges vary between laboratories, and between the methods and instruments they use — the range printed on your own report is the one your result should be compared with. A result outside the range is not by itself a diagnosis, and a result inside it does not rule out illness. These pages are an educational summary, not medical advice: always discuss your results with the clinician who ordered them, who can interpret them in the context of your health and history.

Lab Tests Beginning With I

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