Most common as a suffix or compound element for kinds of doctors, as in 外科医, 専門医, or 産婦人科医. As a standalone noun, 医 is more formal or literary than 医者 or 医師.
There is a saying that medicine is a benevolent art.
We study the ethics of medicine.
She works as a surgeon.
I hope to become a doctor in the future.
医師 is the standard formal noun for a doctor used in official and written contexts, whereas 医 as a standalone noun is even more literary and mostly appears as a suffix like 外科医.
医学 refers to medicine as an academic discipline or science, while 医 in its first sense refers more broadly to the healing art or practice itself.
医術 emphasizes the practical skill or technique of healing, while 医 alone is a more abstract, classical term for medicine as an art.
Sino-Japanese reading い of the kanji 医, conventionally associated with medicine, healing, and physicians. It functions largely as a bound morpheme or suffix in modern compounds.
medicine; pharmaceutical drugs; medical treatment · medical practice and dispensing; medicine and pharmacy
medical specialist; specialist doctor
attending physician; doctor in charge · primary care physician; family doctor; GP
medical university; medical school
medical science; medical field; medical department
military doctor; military surgeon
medical affairs
medical office; doctor's office
noted doctor; excellent physician
private practitioner; physician in private practice
medical use; for medical purposes
medicine; medical art; medical skills
medical affairs; medical practice
medical practice; the medical profession
court physician; imperial physician
medical director; chief physician
school doctor; school physician
ship's doctor
the art of medicine; medical practice
cure; heal
dentist