While common in the past It’s extremely unusual for any ASC to offer anesthesia ownership anymore as anesthesia does not bring cases or generate revenue (although one can argue that there is a huge difference in what type patients or cases anesthesia groups are comfortable doing at an ASC and so a more flexible group brings more cases).
The good ASCs or I should say profitable ASCs recognize this and would never offer an anesthesia share versus new surgeons.
As some alluded too, many non profitable ASCs that yield little return and many have shut down as well.
Look at the numbers but have to ask yourself why they are offering you a share when you don’t generate revenue for the facility