The switch from ICD-9 to ICD-10: When and why - ICD.Codes
https://icd.codes/articles/icd9-to-icd10-explained
WebOct 7, 2015 · While there are approximately 14,000 ICD-9 codes, there are over 70,000 ICD-10 codes. This level of detail helps hospitals to bill insurers and the Center for Medicare & Medicaid Services (CMS). Additionally, the high level of detail helps HHS and other healthcare researchers to perform lifesaving statistical analysis of diagnosis trends.
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