Wikipedia:Articles for deletion/List of Read codes
An article on what Read Codes are, and why they are important, and how they get determined, how long they've been around, how many there are, etc. might well be encyclopedic (the 64K hits on the term suggests that they indeed are an important concept). BUT, an incomplete list, non authoritative, with an authoritative source elsewhere, and with no hope of being kept current without herculean effort, is not. I think you may not be thinking about what  means with respect to lists of things in broad enough terms
— User:Lar, 22:12, 15 January 2006 (UTC)
Stance: comment
Cited policy: WP:NOT (Wikipedia:What Wikipedia is not)