A high-deductible health plan (HDHP) is a health insurance plan with lower premiums and higher deductibles than a traditional health plan. Being covered by an HDHP is also a requirement for having a health savings account. Some HDHP plans also offer additional “wellness” benefits, provided before a deductible is paid. High-deductible health plans are a form of catastrophic coverage, intended to cover for catastrophic illnesses.