HCUP Methods Series - Agency for Healthcare Research and Quality

Table of ContentsABSTRACT……………………………………………………………………………………….2INTRODUCTION TO THE CLININCAL CLASSIFICATIONS SOFTWARE (CCS)……….3OVERVIEW………………...…………………….….………………………...………..3PURPOSE……………………………………………………………………………….3HISTORY OF DEVELOPMENT……………………………………………………….4DESCRIPTION…………………………………………………………………………………...4SINGLE-LEVEL CCS…………………………………………………………………...4MULTI-LEVEL CCS……………………………………………………………………..6WARNINGS ABOUT ICD-9-CM CODING CHANGES………………………………………8TIME PERIOD COVERED BY CCS…………………………………………………..8ICD-9-CM CODES REQUIRING SPECIAL TREATMENT…………………………9DESCRIPTION OF DOWNLOADABLE FILES……………………………………………….9UNZIPPING FILES…………………………………………………….………………..9SINGLE-LEVEL CCS…………………………………………………………………...9MULTI-LEVEL CCS……………………………………………………………………10USING TRANSLATION FILES……………………………………………………....13REPRESENTATION OF ICD-9-CM DIAGNOSIS CODES…………………….….13REPRESENTATION OF ICD-9-CM PROCEDURE CODES……………………..14REFERENCES…………………………………………………………………………………15APPENDIX 1: SINGLE-LEVEL CCS DIAGNOSES LABELS……………………………..16APPENDIX 2: SINGLE-LEVEL CCS PROCEDURES LABELS…………………………..22APPENDIX 3: MULTI-LEVEL CCS DIAGNOSES LABELS…………………….…….......28APPENDIX 4: MULTI-LEVEL CCS PROCEDURES LABELS…………………………….43