Ready for a quick and beginner-friendly ICD-10-CM code lookup? In this short tutorial, I’ll show you exactly how to find the diagnosis code for chest pain using the ICD-10-CM book. If you’re new to medical coding, this is a great place to start! ICD-10-CM coding can get complex, but learning how to navigate the book is the first step. Medical coders use a mix of tools, from paper code books to ebooks and online lookup systems, so you’ll see how the process works no matter what format you prefer.