Introduction to ICD-10-PCS 2025/2026 – Updated Root Operations & Coding Principles | Complete Definitions, Structure, Tables & Terminology

This document offers a comprehensive introduction to the ICD-10-PCS coding system for the 2025/2026 cycle, with exam-ready questions and 100% correct answers. It is designed as a foundational learning tool for students and professionals entering the world of procedural coding. The material explains the structure and logic of ICD-10-PCS codes, focusing on the seven-character code format: Section, Body System, Root Operation, Body Part, Approach, Device, and Qualifier. Each of the 31 root operations is clearly defined with examples, covering key procedures such as Excision, Resection, Drainage, Fusion, Bypass, Insertion, Replacement, and more. Users will also learn important concepts like completeness, expandability, standard terminology, and multiaxial code construction. The document includes definitions for coding tables, index use, and value selection, making it ideal for understanding how to build and assign valid PCS codes accurately. Recommended for: Courses: Introduction to ICD-10-PCS, Medical Coding Fundamentals, Health Information Management, Clinical Classification Systems, Coding & Reimbursement Students & Professionals: HIM students, entry-level medical coders, CCS/CPC candidates, RHIT/RHIA learners, coding bootcamp participants, and healthcare documentation specialists seeking a clear foundation in procedural coding Keywords: ICD-10-PCS, coding structure, root operations, PCS code format, body system codes, procedural terminology, multiaxial coding, PCS values, medical coding principles, inpatient coding, coding tables, excision vs resection, drainage, fusion, insertion, repair, replacement, control procedure, cosmetic surgery coding