醫生 is the title used to refer to medical doctors or physicians in China.

Note: Sometimes, this same term is used in Korean, but not common.

The meaning is close to “healer [of] life” as the first character, 醫, can mean medicine, the healing art, healing, curing, medical, to cure, or to treat. The second character, 生, means birth or life.

In Japan, they use a simplified version of the first character (医生 is also used as the Simplified Chinese version of Doctor). If you want this version, please click the characters to the right instead of the button above.

妙手仁心悬壶济世 is a phrase that celebrates the benevolence, skill, and service to his/her patients.

Here's a breakdown of the characters:
妙手 miào shǒu admirable skill in curing disease (when used in reference to doctors).
仁心 rén xīn kindheartedness, charity, benevolent heart.
悬壶济世 xuán hú jì shì practice medicine or pharmacy to help the people or the public.

妙手仁心 is a phrase that celebrates the benevolence, skill, and service to his/her patients.

Here's a breakdown of the characters:
妙手 miào shǒu is an admirable skill in curing disease (when referring to doctors).
仁心 rén xīn kindheartedness, charity, benevolent heart.

医師 is the most common title used to refer to medical doctors or physicians in modern Japanese Kanji.

Before WWII, this would be written 醫師 in Japan (same as Traditional Chinese).

醫者 is a secondary title used to refer to medical doctors or physicians in Japanese Kanji.

醫師 is the title used to refer to medical doctors or physicians in old Korean Hanja.

Notes:
Also means “doctor” in Chinese but is not the most commonly used title.
醫師 is the ancient/traditional form of doctor in Japanese (they simplified the first character to 医 in Japan after WWII).