In all the years that I have had cats I have never been charged for a follow up appointment. I only took my cat to Bansfield because my regular vet was closed and I wanted to get him checked out.
The initial visit went fine but I took him back 2 weeks later for the vet to check his paw and was charged $25.00.
I will never ever take him back. I also took him there because they accept care credit but apparently you have to spend a min of $250 to be able to use it so that is another negative.