Bayne, 20, entered the Mayo Clinic in Rochester, Minn., two weeks ago to undergo tests for symptoms originally thought to have been related to an insect bite for which he was hospitalized briefly last month.
He was released last week still receiving treatment for blurred vision - the result, doctors said, of an “inflammatory condition.” He has missed the last three Nationwide Series races.
"I can't say definitely (Bayne will return at Charlotte) because I don't have the right pay grade and education for that but he is making progress and his symptoms are by and large gone," said team owner Jack Roush.
"His blurred vision is by and large gone but we are going to take him to Gresham (Motorsports Park) in Georgia to give him some laps to see if he is comfortable and then report back to the doctors and NASCAR to see what they think."
Roush officials said earlier this week they hoped Bayne would be able to compete in next Saturday's Sprint All Star Race at Charlotte as well as the Nationwide race in Iowa.
Bayne qualified for the all-star race by winning the season-opening Daytona 500, driving the No. 21 Ford for the Wood Brothers.