Henry,
If you'd like a hyperbaric physician who evaluates divers to put eyes on your file, there are a few who are relatively close to Champaign. The closest is at Methodist Hospital of Clarian Health in Indianapolis. In the Chicago area, there are Ingalls Memorial Hospital in Harvey and Swedish Covenant Hospital in the city. In St. Louis, there is St. Luke's Hospital. We can provide contact info for one or more of these if you need it.
In general, people who have made a full, uncomplicated recovery from a traumatic pneumothorax are ok to dive, but we would encourage you to have a board-certified hyperbaric physician evaluate you. If that doesn't work for you, then you can have your radiologist contact us at the Duke Hyperbaric Center and we'll put him/her in touch with one of our attending physicians.
Duke Dive Medicine. Doctors for Divers, Climbers and Explorers
"I think I'm willing to take the known risk. I think I'd rather die from a diving accident in SouthEast Asia than a cycling accident in Central Illinois."
A final word on risk: having analyzed a few diving fatalities, my guess is that most victims, if they could speak, would not be saying, "By golly, that was worth it!"
Good luck, and enjoy a slice of Papa Del's for those of us back east who can't get good pan pizza!