HIAA may refer to:
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Health Insurance Association of America
AHIP (formerly America's Health Insurance Plans) is an American political advocacy and trade association of health insurance companies that offer coverage through the employer-provided, Medicare Advantage, Medicaid managed care, and individual m ...
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Halifax International Airport Authority
The Halifax International Airport Authority (HIAA) is a Canadian airport authority charged with operating Halifax Stanfield International Airport on behalf of Transport Canada.
The HIAA was established in November 1995 in advance of changes to t ...
, a Canadian airport authority charged with operating Halifax Stanfield International Airport on behalf of Transport Canada
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5-Hydroxyindoleacetic acid (5-HIAA), a metabolite of serotonin used to diagnose carcinoid tumors
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