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ICD-10, ICD-10-CM, & ICD-10-PCS

ICD-10-CM and ICD-10-PCS are classification systems used for coding diagnoses, procedures, and services provided by the U.S. health care system.


For more information about ICD-10-CM and/or ICD-10-PCS email Judy Bielby.

Judy Bielby, MBA, RHIA, CPHQ, CCS, FAHIMA is a clinical assistant professor in the KU Medical Center's Dept. of Health Information Management. Bielby has over 25 years of experience in the health care industry including coding, compliance, risk management, quality management, survey preparation, documentation improvement, and various special projects. She holds the following credentials:

About ICD

The International Classification of Diseases and Related Health Problems (ICD) is used around the world for collecting, classifying and presenting mortality statistics. The revision of the ICD currently in use is the International Statistical Classification of Diseases and Related Health Problems 10th Revision (ICD-10).

In the U.S. ICD-10 was implemented for mortality coding and classification from death certificates in 1999. The National Center for Health Statistics (NCHS) developed a Clinical Modification (ICD-10-CM) for medical diagnoses based on WHO’s ICD-10 and Centers for Medicare and Medicaid Services (CMS) developed a new Procedure Coding System (ICD-10-PCS) for inpatient procedures. ICD-10-CM replaced ICD-9-CM, volumes 1 and 2, and ICD-10-PCS replaced ICD-9-CM, volume 3 effective with discharges and services performed on or after October 1, 2015.

At the May 2019 World Health Assembly Member States adopted ICD-11, and Member States will start reporting using ICD-11 January 1, 2022.  A version of this ICD-11 was released on June 18, 2018 to allow Member States to prepare for implementation and it can be accessed on the WHO ICD website.

About ICD-10-CM and ICD-10-PCS

ICD-10-CM and ICD-10-PCS are classification systems used for coding diagnoses, procedures and services provided by the U.S. health care system.

For more information, please view the additional tabs on this guide.

Are ICD-10 and ICD-10-CM the Same Thing?

Many entities say “ICD-10” when they actually are referring to ICD-10-CM and/or ICD-10-PCS. Technically they are not the same thing.  ICD-10-CM is a clinical modification of the WHO’s ICD-10. ICD-10-CM and ICD-10-PCS are used in the United States to report diagnoses and procedures on electronic healthcare claims transactions in the U.S. ICD-10 is used around the world to classify diseases and other health problems from various forms of health records and vital records. In the United States ICD-10 is used to code data from death certificates.

Additional Resources on ICD

View these links for more on ICD.