The first three digits of House's Social Security number, shown on his wristband, indicate that he applied for it in Ohio (where he is presumably from). The wristband also shows his date of birth as June 11, 1959 - Hugh Laurie's actual birth date.
The taco stand "The Cactus" that is used in this episode is a very popular spot for Mexican food in Los Angeles, on Vine St. north of Melrose. This is one of the few outdoors scenes that is an easy-to-spot Los Angeles locale
In the end of season two, House hallucinates after being shot, and through his hallucinations gains consciousness again. In the third season of the TV show Sherlock (2010), Sherlock does the same thing to save his own life after being shot. House' character has been said to be based on Sherlock Holmes, the same character Sherlock (2010) is based on.