The American Academy of Professional Coders offers a practice test that mirrors the ICD-10-CM proficiency assessment at AAPC.com. As of 2015, the cost to take the practice test is $29.95 for AAPC members and $39.95 for non-members.
Free quizzes to help students prepare for the ICD-10 coding test are available at JustCoding.com. The quizzes are listed according to the date they were added to the site, so it is important to check the title of the quiz to ensure it is an ICD-10 quiz. The site's quizzes are broken into sections specific to codes for particular areas, such as the ICD-10-CM codes for muscle disorders or the ICD-10-CM codes for diseases of the circulatory system.