If a pedestrian is hit by a car and the driver takes off, but does come back to the scene of the crime, is this considered a hit and run?

If you are asking for purposes of a traffic citation, then technically yes pursuant to a reading of Sec 20-102 of the Maryland Transportation article. § 20-102. Driver to remain at scene -- Accidents resulting in bodily injury or death    (a) Bodily injury. --   (1) The driver of each vehicle involved in an accident that results in bodily injury to another person immediately shall stop the vehicle as close as possible to the scene of the accident, without obstructing traffic more than necessary.   (2) The driver of each vehicle involved in an accident that results in bodily injury to another person immediately shall return to and remain at the scene of the accident until the driver has complied with § 20-104 of this title.(b) Death. --   (1) The driver of each vehicle involved in an accident that results in the death of another person immediately shall stop the vehicle as close as possible to the scene of the accident, without obstructing traffic more than necessary.   (2) The driver of each vehicle involved in an accident that results in the death of another person immediately shall return to and remain at the scene of the accident until the driver has complied with § 20-104 of this title.HISTORY: An. Code 1957, art. 66 1/2, § 10-102; 1977, ch. 14, § 2; 1986, ch. 472, § 1; 1988, ch. 6, § 1; 1991, ch. 346, § 1; 1998, ch. 781; 2001, ch. 483; 2002, chs. 461, 462; 2005, ch. 482.