One of the key principles of Lean thinking is the creation of flow. Flow as in no waiting time if it has no added value (time to think and reflect or time to process bad news are examples of waiting times with added value).
What would a hospital look like without waiting time? So far, I have only seen this question answered as a “what if…” exercise. However, there appears to be a hospital in India, which seems to know the answer to this question.