hypoparathyroidism UMLS_CUI:C0020626 GARD:6733 MESH:D007011 ICD10CM:E20 OMIM:307700 ORDO:2238 NCI:C78350 DOID:11199 MESH:D007011 Xref MGI. disease_ontology ICD9CM:252.1 OMIM:146200 SNOMEDCT_US_2020_03_01:154697005 A parathyroid gland disease characterized by decreased function of parathyroid glands with underproduction of parathyroid hormone (PTH), leading to abnormally low ionized calcium levels in the blood. parathyroid gland disease