Seeing this patient for the first time in July 2019, initial workup for possible causes of hypercalcemia included intact PTH (iPTH) suppressed at 5 pg/mL, calcitriol (1,25-dihrdoxyvitamin D ) elevated at 80.4 pg/mL, calcidiol (25-hydroxyvitamin D) low at 15.1 ng/mL, parathyroid hormone-related peptide (PTHrP) normal (< 2.0 pmol/L), serum protein electrophoresis (normal), ACE levels low at 2 U/L, complete blood count (normal), an elevated serum calcium (11.9 mg/dL) and creatinine (1.8 mg/dl), a whole-body bone scan (normal), and urinalysis (normal). This evidence concerns the gene PTH and hypercalcemia disease.