- UPDATED 2017 Official Code set reflects the latest ICD-10-PCS codes needed for procedure coding. - NEW! Enhanced Official Guidelines for Coding and Reporting provide easier reference to coding rules when they are needed most. - NEW! Updated design better differentiates between Os and 0s. - NEW! Combinations symbol identifies procedures that can affect MS-DRG assignment. - NEW! Procedure Combination Table lists each procedure cluster and DRG. - NEW! Highlight for Non-Operating Room Procedures identifies procedures that do and do not affect MS-DRG assignment.