If the child has been treated multiple times then it is one of two things. Either the parents are not treating it properly or it is not scabies. I doubt the child has seen multiple doctors as you can't just see multiple drs. Only in a practice of multiple drs may a dr call on a colleague to confirm but I find it highly unlikely that a dr would ask for a second opinion on something so common as scabies. Is this parent paying for the spot right now? Do you have in your contract that regardless of attendance if you are available to provide care they have to pay for the days? If not then terminate. I understand trying to be accommodating and compassionate to certain situations as these but it does not serve you well as a business to take a financial loss over an extended period of time. If you are charging for the spot then on their heads be it. Scabies are brutal as I have had them a few times years back when I worked in hospitals but as kindertime said, once treated I was allowed to go back to work within 24 hours regardless of itching.