In the Current Procedural Terminology (CPT) manual, Appendix G, it covers Medicare "Internet-Only Manuals" (IOMs). If you search in a web browser for IOM, you may find the Centers for Medicare & Medicaid Services (CMS) website where there is a section entitled "Medicare Managed Care Manual". This is an excellent reference that covers many aspects of the risk adjustment process. I have listed the links below: Internet Only Manuals : https://www.cms.gov/Regulations-and-Guidance/Guidance/Manuals/Internet-Only-Manuals-IOMs Internet Only Manual, Publication #100-16 entitled Medicare Managed Care Manual : https://www.cms.gov/Regulations-and-Guidance/Guidance/Manuals/Internet-Only-Manuals-IOMs-Items/CMS018912 Internet Only Manual, Chapter 7 - Risk Adjustment , Medicare Managed Care Manual: https://www.cms.gov/Regulations-and-Guidance/Guidance/Manuals/Downloads/mc86c07.pdf Once you reach this .pdf you may find this to be a great reference and s