Zhè wèi yīshēng de wàikē shǒushù shuǐpíng hěn gāo.
This doctor's surgical skill is very high.
Tips
usage
外科 (literally 'outside department') refers to surgical specialties, contrasted with 内科 ('inside department' = internal medicine, treated with drugs). 手术 alone often suffices — 外科手术 is more formal.