noun
diagnostician
A medical professional, typically a physician, who specializes in determining the nature of a disease or condition. Often used in clinical or hospital contexts.
彼は大学病院で診断医として働いている。
He works as a diagnostician at the university hospital.
診断医は患者の症状を詳しく調べた。
The diagnostician examined the patient's symptoms in detail.
診断 is the act or process of diagnosis, whereas 診断医 is the person who performs it.
Compound of 診断 (diagnosis) and 医 (doctor). The term is transparently derived from its components.