What is a key criterion for medical benefits in related to injury?

The key criterion for medical benefits related to injury focuses on whether the treatment is necessary to cure or relieve the injury. This principle is essential because it ensures that the medical benefits provided are relevant and appropriate for the condition being treated. Medical benefits are designed to assist in recovery or alleviate symptoms related to injuries, which is why the necessity of the treatment is a fundamental requirement.

Treatments that do not aim to cure or relieve the injury may not be covered under medical benefits, as they would not serve the primary purpose of addressing the health issue at hand. This principle helps prevent unnecessary treatments from being billed to insurance providers, maintaining the integrity of medical coverage.

The other options lack this foundational focus on necessity in treatment. For instance, while mental rehabilitation can be important, it is not always part of medical benefits specifically related to physical injuries. Additionally, treatments being unnecessarily expensive or exclusively for physical treatment do not align with the core criterion of medical benefits, which focuses on addressing the medical needs of the individual efficiently and appropriately.