内外全科医学士（英语：Bachelor of Medicine and Bachelor of Surgery；源于拉丁文：Medicinae Baccalaureus, Baccalaureus Chirurgiae）为医科本科（学士）课程，也是世上头两个出现的专业课程。此衔头获英国及某些模仿英国制度的国家（多为英联邦地区）采用。 医科生在医学院成功毕业后会获得此证明。在某些国家，此课程只称之为“医学士”（Bachelor of Medicine，简称 BMed或BM）。

课程的简称有很多，如：MBBS，MBChB，MBBChir，BMBCh，MB BCh，BMBS等。

Bachelor of Medicine, Bachelor of Surgery, or in Latin: Medicinae Baccalaureus, Baccalaureus Chirurgiae (abbreviated in many ways, e.g. MBBS, MBChB, MBBCh, MBBChir(Cantab), BMBCh(Oxon), BMBS), are the two first professional degrees in medicine and surgery awarded upon graduation from medical school by universities in countries that follow the tradition of the United Kingdom. The naming suggests that they are two separate undergraduate degrees; however, in practice, they are usually treated as one and conferred together, and may also be awarded at graduate-level medical schools. In countries that follow the tradition of the United States, the equivalent medical degree is awarded as Doctor of Medicine (MD).