### Question
Can you define what assistant at surgery means?


### Answer
**Assistant at surgery** is defined as the following in *42 U.S.C. § 1395u*:

> a physician who actively assists the physician in charge of a case in performing a surgical procedure

#### Citation:
  - *42 U.S.C. § 1395u*
  - Heading: **CHAPTER 7-SOCIAL SECURITY > SUBCHAPTER XVIII-HEALTH INSURANCE FOR AGED AND DISABLED > Part B-Supplementary Medical Insurance Benefits for Aged and Disabled**

