He treats 20*.2=<<20*.2=4>>4 extra patients
So he treats 20+4=<<20+4=24>>24 patients at the second hospital
So he treats 20+24=<<20+24=44>>44 patients a day
That means he treats 44*5=<<44*5=220>>220 patients a week
So he treats 220*50=<<220*50=11000>>11,000 patients a year
#### 11000