3-2-1 Code It! 2020

3-2-1 Code It! 2020, 8th Edition, by Michelle Green, is an introductory medical coding textbook published by Cengage Learning. Designed for beginning coders preparing for professional credentials, the volume establishes core diagnostic and procedural coding principles.

The text addresses ICD-10-CM, ICD-10-PCS, CPT, and HCPCS Level II code sets, conventions, and guidelines. Instructional units introduce diagnosis coding first before guiding learners through coding procedures and services.

Practice resources include coding scenarios with answer keys and a 30-day trial of EncoderPro.com software for hands-on experience.