Can USA be used in Scrabble?

Could you please clarify for me if the word "USA" is a valid and playable option in the game of Scrabble? I'm wondering if its letters combine to form a legitimate word according to the game's rules and dictionary, and if so, what its point value might be. Additionally, I'm curious about any potential nuances or special circumstances that could affect its usability in the game. Thank you for your assistance in this matter.