Book excerpt: Selecting diagnosis codes is faster and easier with Buck's 2021 ICD-10-CM for Physicians. Designed by coders for coders, this full-color manual ensures you learn the most accurate billing and reimbursement codes for medical services provided in the physicians’ office and outpatient settings. As coders need extensive knowledge to code with ICD-10-CM — and to choose from the thousands of possible codes — this edition makes it easier with colorful anatomy plates (including Netter’s Anatomy illustrations) to help you understand anatomy and how it can affect your code choices. In addition, it comes with durable spiral binding, and includes a companion website with the latest coding updates.