NHI may refer to:

  • National Health Index (NHI) Number, a unique identifier used in the New Zealand health system
  • National Health Insurance 国民健康保険 (Kokumin-Kenkō-Hoken?), a form of government health insurance in Japan.
  • National Hispanic Institute, a think-tank focused on the leadership development of young Latinos
  • National Historical Institute, in the Philippines
  • Nederlandse Helikopter Industrie (NHI), a Dutch manufacturer of helicopters
  • New Horizon Interactive (NHI), a video games company, which has developed the popular Club Penguin MMOG
  • NHIndustries, a manufacturer of helicopters