Official Guidelines for Coding and Reporting (OGCR) provide easier reference to coding rules when they are needed most.
Convenient Guide to the 2021 Updates in the front of the book lists all new, revised, and deleted codes, providing at-a-glance lookup of the coding changes.
Unique Procedure Combination Table displays each procedure cluster and the corresponding DRG, as well as a few procedure combinations that are designated as non-OR.