I would think it will depend on how you are after the surgery.

If you are able to do the supervisory job that you are now, SSA would say that you are not disabled. The fact that that job won't be available to you soon isn't their concern.....it proves that you can do A job. It doesn't matter to SSA if you can't do your old job, they will want to determine if you can do ANY job.

Good luck with getting through all of this.