勤務先はDisney Parks and Resortsで良いかと思います。また出張ではなく赴任でよいかと思います。保険が適用されるならば
その病院で予約をお願いします。日本から持参した高血圧の薬はもうありませんので早目に手配をお願いします。添付された記入シートは病院に持っていけば良いのでしょうか?よろしくお願いします。
I think your workplace as Disney Parks and Resorts should be fine. I also think that it is OK you write as arrived for a new post instead of business trip. If the insurance is applicable.
Please make a reservation with the hospital. Please arrange it soon, as the medication for highpertension I brought from Japan is running out. Should I take the attached sheet to the hospital? Thank you in advance.