There is no additional policy you can buy to have donut hole insurance. Avoiding the coverage gap altogether is what most people suggest. However, in many cases, it can be hard to avoid the coverage gap.If avoiding the coverage gap has been a mountain you can’t seem to climb, consider calling your prescription drug manufacturers and asking about manufacturer coupons.Also, price checking your drugs online to make sure you’re getting the best co-payment has proven to be beneficial for many people.