KP (keratic precipitates)

kPa (kilopascal)

KPC (Keratoconus posticus circumscriptus)

KPC (Klebsiella Pneumonia Carbapenemase)

KPI (key performance indicator)

Kr (krypton [element])

KS (Kaposi's Sarcoma)

KSS (Kearns-Sayre syndrome)

kU/L (kilounit per liter (allergy testing))

KUB (kidney, ureters, and bladder (x-ray))