Development of an ICD Coding Definition for Inflammatory Bowel ...

Table of Contents
Approval Page .................................................................................................................ii
Abstract......................................................................................................................... iii
Acknowledgements ........................................................................................................iv
Dedication .......................................................................................................................v
Table of Contents ...........................................................................................................vi
List of Tables..................................................................................................................ix
List of Figures and Diagrams...........................................................................................x
List of Abbreviations ......................................................................................................xi
Epigraph........................................................................................................................xii
CHAPTER ONE: INTRODUCTION ..............................................................................1
CHAPTER TWO: BACKGROUND................................................................................3
2.1 Inflammatory Bowel disease ..................................................................................3
2.1.1 Crohn‘s disease..............................................................................................3
2.1.2 Ulcerative colitis............................................................................................4
2.1.3 Diagnosis of Inflammatory Bowel disease .....................................................5
2.1.4 Endoscopic findings in Inflammatory Bowel disease......................................5
2.1.5 Epidemiology of IBD.....................................................................................6
2.2 Administrative databases .......................................................................................9
2.2.1 Hospital Discharge Abstract Database (Inpatient database) ..........................10
2.2.2 Physician claims services database (PC database) ........................................12
2.2.3 Ambulatory Care classification system (ACCS)...........................................13
2.2.4 EndoPro database.........................................................................................13
2.3 International Classification of Diseases (ICD)......................................................13
2.3.1 International Classification of Diseases, 9 th revision, clinical modification
(ICD-9-CM).................................................................................................14
2.3.2 International Classification of Diseases, 10 th revision (ICD-10) ...................14
CHAPTER THREE: SIGNIFICANCE AND OBJECTIVES .........................................15
3.1 Significance .........................................................................................................15
3.2 Objectives............................................................................................................16
3.2.1 Primary objective.........................................................................................16
3.2.2 Secondary objectives ...................................................................................16
CHAPTER FOUR: METHODOLOGY AND DATA ANALYSIS ................................17
4.1 Summarized design..............................................................................................17
4.2 Data sources ........................................................................................................18
4.2.1 EndoPro database.........................................................................................18
4.2.2 Alberta Health Care Insurance Plan registry (AHCIP)..................................18
4.2.3 Physician claims database (PC)....................................................................18
4.2.4 Ambulatory Care Classification System (ACCS) database ...........................19
4.2.5 Hospital Discharge Abstracts database (Inpatient database (IP))...................19
4.2.6 Chart reviews...............................................................................................19
4.3 Classification of endoscopic procedures within EndoPro database .......................19
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