Many thanks to Sandeep for an excellent guide! Please sticky it.
Tom, My plan is the same as yours. The only other wrinkle. We do use AC to generate our lab forms, so the options are to manually change the code list and the patient's diagnoses in AC before the lab form is printed, or write in the ICD10 codes on the lab form.
To the point about support, I think AC should split the annual fee into two parts, one for the upgrades/ERx and one for support. If you don't want to use AC support, then you are not tied to them. In that case, they would also be more accountable for the quality of support, or our dollars will go elsewhere.