Yes. You are required to bring the following codebooks with you to the testing center: ICD-10-CM and ICD-10-PCS. Your materials need to be clean from any notes from other reference sources, free from post-it notes or loose materials, and without handmade tabs. If you arrive at the test center without the required materials, you will not be allowed to test, and you will forfeit your exam fee. Encoders are not allowed at the testing center.