3-2-1 CODE IT! is your comprehensive learning resource for coding. This book combines ICD-9-CM, CPT, and HCPCS Level II coding concepts into one convenient package and offers a level of detail suitable for beginning and more experienced coders alike. When you are ready to earn a coding credential, this book will continue to help you prepare and practice. The book includes an overview of coding systems, career opportunities for coders, the importance of joining professional organizations and obtaining credentials, the impact of working with other coding professionals, and how to develop opportunities for career advancement.