What type of care requires the documentation of a written physician's order?

Billable care requires the documentation of a written physician's order because it involves services that are intended to be billed to insurance. For billing purposes, it is essential to have clear documentation indicating that a physician has authorized the necessary treatments or procedures. This order serves as proof that the prescribed care is medically necessary and meets the criteria set by insurance providers for reimbursement.

In contrast, emergency care typically does not require prior authorization, as the situation demands immediate attention and often occurs without the ability to obtain a physician's order beforehand. Preventative care, while important, does not always necessitate a specific written order to be billed, as many preventative services are covered without requiring a physician’s directive. Informal care refers to non-professional help often provided by family or friends, which usually does not fall under the realm of structured medical billing or requirements for physician orders.

Thus, billable care stands out as the type that strictly requires the appropriate documentation from a physician to ensure compliance with billing regulations and to support claims for reimbursement.