- Familial hypocalcuric hypercalcemia: often + family hx; chronic low level hypercalcemia
- FHH: low 24h urine calcium
- Hypercalcemia = Ca2+> 10.5; Adjust for low albumin by adding .8x(4-albumin) to Ca2+
- Mild hypercalcemia 10.5-12; Moderate 12-14; Severe > 14