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Understanding ICD-10

International Classification of Diseases, 10th Revision (ICD-10) is a diagnostic and procedure coding system endorsed by the World Health Organization (WHO). It replaces the International Classification of Diseases, 9th Revision (ICD-9) that was developed in the 1970s.

ICD-10 is a complete revision of its ICD-9 counterpart. It improves clinical communication by providing more information per code and better support for care management, quality measurement and analytics. It also offers an improved ability to understand risk and severity.

Per the US Department of Health and Human Services (HHS), all entities covered by the Health Insurance Portability and Accountability Act (HIPAA) must switch to ICD-10 beginning October 1, 2015.

For more information about ICD-10, visit the Centers for Medicare & Medicaid Services ICD-10 website at, Small physician practices can jump-start their transition by visiting the Road to 10 and building an action plan.  

Additional ICD-10 resources can be found on the following websites:

JHHC Frequently Asked Questions

Johns Hopkins HealthCare (JHHC) is committed to successfully meeting ICD-10 implementation standards and deadlines. View the JHHC ICD-10 Frequently Asked Questions for JHHC-specific information. For billing and payment Frequently Asked Questions, please click here