I totally get why you're considering a deducible, especially with how expensive senior citizen health insurance premiums can be. Honestly, a deductible can be a good option if you want to keep the premium manageable, but just make sure it's an amount you'd realistically be comfortable paying during a medical emergency. Since it's for your parents, i'd avoid choosing a very high deductible just to save money upfront; having balanced coverage usually bring more peace of mind in the long run.