You can search this thread years back and you will see that the "L" code you are using was changed to G417900. Not sure why, maybe they negotiated a new contract or something. I used that old "L" code for many years and the G417900 replacement code is still my favorite. Consistently low rates and never a hassle. In my opinion, the risk if being asked for am ID or being turned away is not worth the risk with some of the other codes that may be a couple bucks cheaper.