Nondiabetic causes of hyperglycemia include glucose infusion, nonfasting blood specimen, drug-induced reaction (beta-blockers, diuretics, estrogen products, glucocorticoids, etc), and certain liver, pancreatic, endocrine, and blood disorders (acromegaly, Cushing syndrome, glucagonoma, pheochromocytoma, etc). Other causes include stress or trauma (brain injury, general anesthesia, infection, myocardial infarction, etc).
In newborns, hyperglycemia is more often related to parenteral (intravenous) glucose administration in a sick infant, rather than due to neonatal diabetes mellitus.
Hyperglycemia is commonly asymptomatic. With sustained hyperglycemia, symptoms including thirst and craving for water, fatigue, frequent urination, rapid breathing, and fruity breath (diabetic ketoacidosis).
R73.9 – Hyperglycemia, unspecified
80394007 – Hyperglycemia