stomach disorder achlorhydria https://github.com/monarch-initiative/mondo/issues/9097 UMLS:C0001075 achylia gastrica Absence of hydrochloric acid in the gastric juice. hypochlorhydria MESH:D000126 MONDO:0043465 ICD10CM:K31.83 SCTID:47481007 achlorhydria icd11.foundation:157689543 MEDGEN:1714 NCIT:C2850