Someone else was having LP surgery and the vet didn't want to do the neutering surgery at the same time, I think he was a specialist, and perhaps he thought another type of vet should do that, but I know this has happened to others. There are many low cost spay and neuter clinics, if your sugeon doesn't want to do this, you might want to check into that.
Spay/Neuter Florida Best of luck, I hope it's nothing serious.