The transaction comes as for-profit companies offering medical services or owning health care facilities continue to expand nationwide.
Corporate ownership can lift the administrative burden from doctor-owners of independent practices such as Glen Endoscopy. The bigger companies also have lower operating costs, which helps boost profits.
Even accreditation from an independent agency can be a significant cost to a small doctors group, said Chicago-based attorney Douglas Swill, chairman of the health care practice at law firm Drinker Biddle & Reath LLP.
“Bringing in firms that have the resources to provide a level of expertise toward gaining the accreditation and the regulatory certification that's needed is vitally important,” Mr. Swill said.
Glen Endoscopy, which specializes in procedures using a flexible, lighted tube that allows doctors to look inside the body, opened in 2003. Located at 2551 Compass Road in Glenview, the center employs up to 14 doctors who are affiliated with hospitals such as St. Francis Hospital in Evanston and Highland Park Hospital, according to Glen Endoscopy's website.
AmSurg is a longtime player in outpatient surgery centers, with ownership stakes in nearly 230 facilities nationwide, including the North Shore Endoscopy Center in Lake Bluff. AmSurg acquired a majority stake in that north suburban center in 2004.
The company's revenue rose nearly 10 percent, to $782 million, in 2012, from $711 million in 2011.
Representatives at AmSurg did not respond to messages requesting comment.
The transaction is expected to close Oct. 1, the letter filed with the state said.
The other doctor owners are Douglas Adler, Kenneth Chi, Nina Merel, Leela Prasad and Alan Shapiro.
The doctors have agreed not to work for a competing surgical center for five years after the transaction closes, or two years after they sell their remaining ownership interests, according to the letter of intent.
The application has not yet been scheduled for the facilities board to consider, general counsel Frank Urso said.