Herb Dee Ka address is the same as Sabai De Ka Massage School, which is conveniently located in the tourist center near Thapae Gate.
To get there from the gate, walk across the street toward Black Canyon Coffee, turn right and walk down MoonMuang road will see M hotel then approximately 100 meters. Look for the green Sabai De Ka sign just before a motorbike rental shop. When you see it turn left and walk down the side street about 25 meters until you get to Sabai De Ka on your right hand side (you will see a small garden and fountain in front of the shop).
Herb Dee Ka
93/3 Moonmuang Rd.,
Chiang Mai 50200 Thailand