In-out surgery.

In-out surgery. Surgery performed in the outpatient department of a hospital or other institutional provider, in a physician's office or the office of another individual professional provider, in a clinic, or in a freestanding ambulatory surgical center which does not involve a formal inpatient admission for a period of 24 hours or more.

Source

32 CFR § 199.2

Scoping language

General. In an effort to be as specific as possible as to the word and intent of CHAMPUS, the following definitions have been developed. While many of the definitions are general and some assign meaning to relatively common terms within the health insurance environment, others are applicable only to CHAMPUS; however, they all appear in this part solely for the purpose of the Program. Except when otherwise specified, the definitions in this section apply generally throughout this part.