ICD-10 Code I10 Explained (2025): Master Essential Hypertension for Coding & Billing Success Learn how to accurately code essential hypertension using ICD-10 Code I10 in 2025. This expert guide breaks down clinical criteria, coding tips, billing rules, and real-world examples for medical coders and billing students. High blood pressure, or hypertension, continues to be one of the most common and serious chronic health conditions worldwide. In medical coding, ICD-10-CM Code I10 is the standardized code used for essential (primary) hypertension , which is the most prevalent type of high blood pressure not linked to any secondary cause. This blog provides a complete and up-to-date overview of the 2025 edition of ICD-10-CM Code I10 , effective October 1, 2024 , along with coding guidelines, clinical context, expert advice , and practical examples. 🔍 What Is ICD-10-CM Code I10? ICD-10-CM I10 represents essential (primary) hypertension , a condition where ...