Mixed presentation of diabetic ketoacidosis (DKA) and hyperosmolar hyperglycemic state (HHS) has been reported in up to 27% of hyperglycemic emergencies. This 15-year retrospective chart review describes clinical features, risk factors, and outcomes among children presenting with hyperglycemic emergencies at our center. Out of 322 patients, 92% were Afro-Caribbean or Black with a mean age of 13.6 years, comprising 266 (83%) with DKA, 52 (16%) mixed DKA-HHS, and rarely with HHS (1%,