We present a case of a 75-year-old woman with persistent hypercalcemia (serum calcium 10.7 mg/dL, ionized calcium 1.37 mmol/L), elevated parathyroid hormone levels (86.6 pg/mL), and significantly low 24-hour urinary calcium excretion (<11 mg/24 hours). Here, PTH is linked to Hypercalcemia.