What concept is defined as determination that a service or procedure rendered is reasonable and necessary for the diagnosis or treatment of an illness or injury?

The correct answer is - medical necessity.

Explanation:

The concept of medical necessity determines that a health care service or procedure and all the supplies required for healthcare must be necessary and reasonable for the management, diagnosis, and evaluation of injury.

It should be reasonable and should be compared and judged on the basis of the current medical guidelines and system decided.

Thus, the correct answer is - medical necessity.

with out the ancient ppl we wouldnt have medicine beacuse they taught us.