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HIAA

HIAA may refer to:

  • Health Insurance Association of America
  • Halifax International Airport Authority, a Canadian airport authority charged with operating Halifax Stanfield International Airport on behalf of Transport Canada
  • 5-Hydroxyindoleacetic acid (5-HIAA), a metabolite of serotonin used to diagnose carcinoid tumors
  • HIAA (AM), a radio station using frequency 560 AM, in Santiago, Dominican Republic