Several web sites offer free training materials in medical coding including, and These resources provide supplemental training to professionals and those seeking certification in medical coding. provides 15 training videos. Topics include the transition from ICD-9-CM to ICD-10-CM codes, human anatomy and medical terminology. provides 15 written courses viewable on the web site. Covered subjects include health insurance providers and the process for becoming certified in medical billing and coding. offers free medical coding quizzes. Quizzes have 10 questions and provide the opportunity to practice for the certification exam. Topics include medical terminology, anatomy and insurance.