ICD-10 Implementation FAQs 1. What is ICD-10? 2. When will ICD-10 be implemented? 3. Why is the United States transitioning to ICD-10? 4. Is there a grace period to submit ICD-9 codes after October 1, 2014? 5. What preparations need to be considered? 6. Do coders need additional anatomy and physiology and pathophysiology training? 7.