Question: I've never really gotten comfortable with ICD-10 and often find myself coding ICD-9 in my head and then using a tool to "translate" to ICD-10. My coworkers aregiving me a hard time about this - do I really need to change? Arkansas Subscriber Answer: Yes, you really do need to change. Here are some good reasons: Do this: Instead of using GEMs and look-up tools, such as the tool available on https://www.aapc.com/codes/ to "translate" ICD-9 codes into ICD-10, use these as a learning device to get yourself comfortable with ICD-10. To see links to the GEMs and other information, visit www.cms.gov/Medicare/Coding/ICD10/2018-ICD-10-CM-and-GEMs.html.