High >10.5 meq/L (>2.7 ionized)
High! >12.0 meq/L
80% of cases associated with malignancy (most common among inpatients) or hyperparathyroidism (most common among outpatients)
Symptoms most correlated with rate of rise of Ca, not absolute level
Hypercalcemia
Addison's disease
Hypocalcemia
Calciphylaxis
Ketonemia
Excess vitamin D
Hyperammonemia
Hypercalcemia of malignancy