Which of the following is not true of Medicare supplement insurance plans?

Medicare supplement insurance plans, also known as Medigap plans, are designed to help cover some costs that original Medicare does not, such as copayments, coinsurance, and deductibles. One of the key characteristics of these plans is that they do not impose restrictions on which specialists a member can see. Unlike some managed care plans, Medicare supplement insurance allows members the freedom to choose any healthcare provider who accepts Medicare, which means members typically do not need to coordinate care through a primary care physician or obtain referrals to consult with specialists.

This characteristic is what makes the assertion about having no restrictions on specialists true. In contrast, many health plans do have restrictions concerning referrals and primary care coordination, which is why those statements are not applicable to Medicare supplement policies. The lack of restrictions enhances the flexibility and accessibility of healthcare services for beneficiaries.