Have CLSI's document codes changed? Victoria Phucas December 03, 2019 21:42 Updated Follow As part of an initiative to better classify our library of documents, some CLSI documents were assigned new codes to reflect their categories. Find out more here. Related articles How can I receive a copy of the CLSI catalog? How do I cite a CLSI document? Can I make a payment online without a credit card? Can I place my order with an order form?