Proper way to address an envelope to a doctor office?

Proper way to address an envelope to a doctor office?
The proper way to address an envelope to a doctor office is tofirst input the name of the clinic. On the second line you caninsert in care of or C/O with the doctor's name. On the third andfourth line you can insert the address, city, and zip code. Includeany suite or floor numbers of the doctor's office on the thirdline.