PO. HDHP is High-Deductible Health Plan, a form of catastrophic coverage with lower premiums and higher deductibles than a traditional plan. Source: Kaiser/HRET Survey of Employer-Sponsored Health Benefits, 1999-2009; KPMG Survey of KP Employer-Sponsored Health Benefits, 1993, 1996; The Health Insurance Association of America (HIAA), 1988 (@E www.kpcb.