Ironically, probably the most common disease to affect cats is the one not necessarily covered by pet health insurance. We’re talking about dental disease. By the age of 3, 85 percent of cats show at least some dental deterioration in the form of periodontal (gum) disease. If left untreated, it can lead to infections and, eventually, tooth loss. Fractured teeth comprise another common dental issue. But health insurance for cats varies widely in terms of reimbursing for treatment, which for a procedure like multiple teeth extractions can easily cost thousands of dollars.