Hypercalcemia classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:

Overview

Hypercalcemia may be classified according to severity into 3 groups including mild, moderate, and severe hypercalcemia

Classification

Hypercalcemia may be classified according to severity into 3 groups:

Severity	Calcium concentration	Key Points
Mild hypercalcemia	<3.0 mmol/L	Often asymptomatic No urgent correction needed
Moderate hypercalcemia	3.0–3.5 mmol/L	Tolerated well if there is a slow rise Symptoms may be present Treatment indicated in symptomatic cases
Severe hypercalcemia	>3.5 mmol/L	Urgent correction is recommended Risk of dysrhythmia and coma if not corrected