Lab Tests Beginning With C

14 tests in the Lab Values reference begin with the letter C. 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)
C-Peptide	—	1.1–4.4 ng/mL	0.37–1.47 nmol/L
C-Reactive Protein	CRP	<0.3 mg/dL	<3 mg/L
Calcitonin	—	Male <8.4; Female <5.0 pg/mL	Male <8.4; Female <5.0 pg/mL
Calcium, Total	Ca	8.5–10.5 mg/dL	2.12–2.62 mmol/L
Carboxyhemoglobin	COHb	<3 %	<3 %
Chloride	Cl	98–107 mEq/L	98–107 mmol/L
CK-MB	—	<5 ng/mL	<5 ng/mL
Complement C3	C3	90–180 mg/dL	0.90–1.80 g/L
Complement C4	C4	10–40 mg/dL	0.10–0.40 g/L
Copper	Cu	70–140 µg/dL	11–22 µmol/L
Cortisol, Morning	—	6.2–19.4 µg/dL	171–535 nmol/L
Creatine Kinase, Total	CK	Male 39–308; Female 26–192 U/L	Male 39–308; Female 26–192 U/L
Creatinine	Cr	Male 0.7–1.3; Female 0.6–1.1 mg/dL	Male 62–115; Female 53–97 µmol/L
Cystatin C	—	0.5–1.0 mg/L	0.5–1.0 mg/L

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 C

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