With the rapid development of social economy, the medical security system is becoming more and more perfect. In the national medical security system, we often hear the words "extreme functions such as medical insurance". The so-called "extreme medical insurance" means that the medical insurance fund will bear the medical expenses of patients to the maximum extent. In other words, when the patient's medical expenses exceed the maximum limit of the medical insurance fund, medical insurance will bear the remaining expenses to minimize the patient's economic burden.

The application scope of extreme measures such as medical insurance is very limited. Generally speaking, only when the patient's medical expenses exceed the cap limit of the medical insurance fund will medical insurance implement "extreme functions such as medical insurance". In addition, there are some other restrictions, such as the cumulative payment limit of medical insurance fund, the payment ratio of medical insurance fund and so on.

Extreme functions such as medical insurance are very important for patients. In daily life, many patients can't afford high medical expenses due to economic reasons, which leads to the inability to get timely treatment. This situation can be alleviated in the case of "extreme situations such as medical insurance". At the same time, "extreme functions such as medical insurance" can also urge medical institutions, doctors and other medical service providers to improve their service level, reduce waste, reduce medical expenses and better protect patients' health.