Which of the following statements about waiting periods in health insurance is true?

The statement indicating that waiting periods can vary by the type of coverage selected highlights a fundamental aspect of health insurance plans. Different types of policies—such as individual health plans, group plans, critical illness insurance, and disability insurance—may impose different waiting periods. For example, group health insurance may not have a waiting period for pre-existing conditions, whereas certain specialty products might have a longer waiting period before coverage becomes effective for specific conditions. This variability allows insurers to design products that cater to different needs and risk profiles, ultimately resulting in diverse waiting period structures based on the nature of the insurance coverage.

The other statements do not accurately reflect how waiting periods function in health insurance. While it's true that waiting periods exist, they do not apply universally to all types of policies. Additionally, waiting periods can often exceed 30 days, especially in certain types of plans. Lastly, states regulate waiting periods, but they are legally permitted under various circumstances, making the assertion that they are not allowed at all incorrect.