What is 100 percent coinsurance?

100 percent coinsurance is an insurance arrangement where the insured is responsible for all costs of a covered expense after meeting their deductible. Unlike typical coinsurance models, where the insurer and insured share costs (e.g., 80/20), with 100 percent coinsurance, the insurer does not contribute to expenses beyond the deductible. This means that once the deductible is met, the insured pays 100% of remaining costs out of pocket. It is important to carefully consider this arrangement, as it can lead to significant financial liability for the insured.