If you have a current physical, additional blood work may not be required. When I restarted HRT, my blood work was way out of date so we ran everything that might be important.
Normally procedure is to start on a low dosage to see how your body reacts to HRT and if everything remains good, bump up to dosage over a few months to a year. You also need to indicate to your doctor that your goal is to receive a transition dosage as they may hold back if you aren't full time yet.
