The health system already owns the site, a former post office, where the ASC has been proposed.
The system has already filed a certificate-of-need application with the state for an additional $34.7 million for the project, which was originally anticipated to cost $38.7 million.
If approved, the ASC will be completed in July 2025 and will include eight operating rooms, two procedure rooms and related clinical space.
Other systems in the state, including Greensboro, N.C.-based Cone Health, have been actively opposing the addition of a new Atrium ASC in the region, worried the system is creating a monopoly.
Cone Health opened its own $97 million ASC two miles from where Atrium plans to open its ASC just last year.