Black Jack ONA
Japanese title: ブラック・ジャック(インターネット版)
Alternative titles: Black Jack: Internet-han
Type: ONA
Source: Manga
Episodes: 12
Status: Finished Airing
Aired: Jan 8, 2001 to Jan 1, 2002
Duration: 16 min per ep
Rating: PG - Children
Genres: Drama
Themes: Medical

Black Jack, a mysterious young unlicensed doctor with godlike skills, travels the world performing feats of impossible surgery, charging vast fees for his services, and challenging the corrupt practices of the medical establishment. This selection of stories, each adapted from a single original manga issue, focuses more on interpersonal relationships and back-story than most other Black Jack series. 

(Source: ANN)