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PPO (Preferred Provider Organization) plans are designed to offer members flexibility and more choices when it comes to accessing healthcare services. One of the defining features of PPO plans is that they do not require referrals to see specialists. This means that members can directly schedule appointments with any specialist or healthcare provider without needing approval or a referral from a primary care physician. This level of accessibility is a significant advantage for individuals who prefer to manage their healthcare needs without additional barriers.

In contrast, other plan types, such as HMOs (Health Maintenance Organizations), typically do require referrals, which can create a more cumbersome process for members who need specialized care. By not enforcing a referral requirement, PPO plans support more autonomous healthcare decision-making for their members. This characteristic contributes to the overall appeal of PPO plans, particularly for those who value direct access to a wide range of healthcare services.