ASC Transactions & Valuation Issues

Envision Healthcare/AmSurg executives rang the opening bell at the New York Stock Exchange on Dec. 8, 2016.

Here are the new outpatient surgery centers and ASCs opened or announced over the past year.

Greenwood, Colo.-based Envision Healthcare's physician services division acquired Alabama Neonatal Medicine in Montgomery.

Here are five key notes on ASC companies from the past week.

Greenwood, Colo.-based Envision Healthcare shares more than tripled following news that the company completed its merger with Nashville, Tenn.-based AmSurg, according to 24/7 Wall St.

Here are 10 new surgery centers that were opened or announced in November.

Nashville, Tenn.-based AmSurg and Greenwood, Colo.-based Envision Healthcare shareholders approved the companies' merger.

Delta Region Authority provided Houston-based Texas County Memorial Hospital $150,000 to open a new surgery center, according to West Plains Daily Quill.

New York City-based Memorial Sloan Ketter Cancer Center held a ribbon-cutting ceremony for its first ASC in Monmouth County (N.J.), according to NJ Biz.

The following five major companies have made a name for themselves in the ASC business, providing management expertise to centers spanning the nation.