When Steve had the hunch something was off about no one hearing from Bo, it was Caroline's visions that sent him to where he eventually found Bo. The only other vision she has had was of Victor having a heart attack......but, as it turned out, Victor was faking it. So, guess no visions for Kayla.
But I agree 100% that the hospital should be wondering about her.
After all, when she did not show up for that Donor board, then the hospital would have been contacted. The hospital has a board, an office staff, etc. People are tending to "business" in her absence. So, the fact that she did not show up there, and no one is able to contact her should be very apparent.
But....just because we all think normally, doesn't mean Salemites do.