To diagnose hypoparathyroidism, a healthcare provider will usually start with a blood test to determine the levels of the following:1,2 Parathyroid hormone Calcium Phosphorus Creatinine Magnesium A urine test determines how much calcium the kidneys are releasing. Citations MedlinePlus. (2018). Hypoparathyroidism. Retrieved May 24, 2019, from https://medlineplus.gov/ency/article/000385.htm National Organization for Rare Disorders. (2017). Hypoparathyroidism. Retrieved May 24, 2019, from https://rarediseases.org/rare-diseases/hypoparathyroidism