Clinical documentation improvement (CDI), also known as “clinical documentation integrity”, is the best practices, processes, technology, people, and joint effort between providers and billers that advocates the completeness, precision, and validity of provider documentation inherent to transaction code sets (e.g. ICD-10-CM, ICD-10-PCS, CPT, HCPCS) sanctioned by the Health Insurance Portability and Accountability Act in the United States.