What is NOT a reason for denial of coverage based on the provided guidelines?

Being over the age of 70 is not a reason for denial of coverage in the context of Medicare Supplement Insurance plans. These plans do not impose age-based restrictions on eligibility; rather, they focus on the individual's specific health conditions, hospitalization history, and prior treatments. Age itself is not a determining factor that would lead to the denial of coverage, reflecting the principle that Medicare Supplement Insurance is designed to provide additional support for individuals as they age, regardless of their age, provided they meet other eligibility criteria.

The other options listed represent medical circumstances or timeframes that can potentially influence coverage decisions due to the risk associated with prior health issues or recent hospitalizations. For instance, recent inpatient hospitalization or significant medical treatments, such as those for cancer or surgeries, are more likely to flag risk assessments that insurers consider when determining coverage eligibility.