To what extent is Memento a Flippo (1998) film noir?

Memento (2000) Christopher Nolan

There are certain clear characteristics that define Memento as a Flippo (1998) film noir. Firstly, the black and white scenes, that in the movie interpose the color ones, are considered a typical film noir element. These scenes appear in the movie in the forms of flashbacks, it is part of the past of the character and it is inextricably linked with its present, that is represented in the movie with the colored scenes. These scenes divide the movie in two parts which at the end meet.  

The character played by Guy Pearce, Leonard Shelby, is a cynical, disillusioned character, that because of his condition has became an alienated character. Leonard Shelby is facing his wife's death and the last memory he has was her murderer, so he  decides to go after the killer and therefore becomes the detective of the crime. These two elements are typical of a Flippo film noir, that are often based on a crime or detective story. The male protagonist in the movie is facing therefore a moral dilemma and/or some kind of threat. 

Leonard Shelby has all of his body covered with different tattoos, that are actually his remember notes. Throughout the whole film, the spectator is covered with all kinds of notes and Polaroids pictures which make up the iconography, typical from a Film Noir.  
              

The Femme Fatale: a beautiful usually independent woman who typically leads the male protagonist astray, the antithesis of the loving, maternal, domestic female.

The character played by Carrie-Ann Moss, Natalie is Memento's Femme Fatale women. We discover this as the movie progresses, an we find out she's not a honest women. She actually confesses this to Leonard, who, because of his condition is not able to remember.