The ICD-10-CM (International Classification of Diseases, Tenth Revision, Clinical Modification) is a system used by physicians and other healthcare providers to classify and code all diagnoses, symptoms and procedures recorded in conjunction with hospital care in the United States.Click to see full answer. Just so, what are ICD 10 codes and why are they used?ICD-10 codes are alphanumeric codes used by doctors, health insurance companies, and public health agencies across the world to represent diagnoses. ICD-10 codes are used for everything from processing health insurance claims to tracking disease epidemics and compiling worldwide mortality statistics. what Are diagnosis codes used for? In health care, diagnosis codes are used as a tool to group and identify diseases, disorders, symptoms, poisonings, adverse effects of drugs and chemicals, injuries and other reasons for patient encounters. Also, what is the purpose of ICD 10? ICD-10-CM is designed for classifying and reporting diseases in all US healthcare settings. ICD-10-PCS (Procedure Classification System) was developed by CMS and is not based on an international coding system.What is the difference between ICD 10 and ICD 10 CM? Primary difference between ICD-10-CM and ICD-10-PCS This is the code set for diagnosis coding and is used for all healthcare settings in the United States. ICD-10PCS, on the other hand, is used in hospital inpatient settings for inpatient procedure coding.