This should be similar to the work bag you carry with you when you see a doctor. There should be some commonly used medical equipment, such as sphygmomanometer, thermometer, oximeter, blood glucose meter and so on. Anyway, it is a relatively complete set of medical equipment in a work bag, which is more convenient for home visits.
However, if you want to bring anything, I think it depends on the specific content of the doctor's reception. If it's some trauma, bring a bandage and disinfectant. Chronic diseases are generally checked with the sphygmomanometer above and so on.