Which statement about rules on rates is NOT true?

The statement that rates remain constant throughout the year is incorrect. In the context of Medicare Advantage plans, rates can change, especially when annual open enrollment periods occur, where premiums and benefits may be adjusted. This can be influenced by various factors such as changes in the market, adjustments in cost structures, or modifications in insurance regulations.

In contrast, rates can indeed vary by state due to differences in regulatory environments, costs of healthcare services, and market competition. Additionally, rates may depend on the chosen plan type, reflecting different levels of coverage and associated benefits. While it is common for various factors such as age and gender to influence underwriting in other types of insurance, within the context of Medicare Advantage, the statement focusing on rates being constant throughout the year is what makes it the least accurate among the options provided.