The most common type of specified disease insurance policy is:

Cataract insurance is less common because cataract surgery is often covered by standard health insurance plans. While specific policies may exist for eye-related conditions, they do not match the widespread demand seen with cancer insurance, making them a niche rather than a common choice.

Diabetes is a chronic condition that requires ongoing management and care; however, specific disease insurance for diabetes is not as prevalent as cancer policies. Most diabetes-related expenses are typically managed through regular health insurance, which covers a broader spectrum of necessary medical services and medications.

Heart disease is a significant health issue, but specified disease insurance for heart conditions is not as common as cancer policies. Although heart disease insurance exists, it does not have the same level of market penetration or consumer recognition as cancer insurance, which addresses a more urgent and widely experienced health crisis.