KD (Kawasaki disease)

KDA (known drug allergy)

kDNA (kinetoplast DNA)

KED (Kendrick Extrication Device)

KELS (Kohlman Evaluation of Living Skills)

kg (kilogram (1 kg = 2.2 pounds = 1,000 g))

KI (potassium iodine)

KLS (kidney, liver, spleen)

km (kilometer)

KOH (potassium hydroxide)