Illinois Department of Public Health EMS Reporting System - IL Hospital Discharge Data Dictionary

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Data Element	Categories	Description	Comments
Age	0 1 - 4 5 - 9 10 - 14 15 - 19 20 - 24 25 - 34 35 - 44 45 - 54 55 - 64 65 - 74 75 + Unknown¹	Age in years, based on the date of discharge from the hospital	Age values are for the most part provided in five or 10-year intervals. Age values over 110 are set to "Unknown."
Gender	Female Male Unknown¹
Cause of Hospitalization	Appendicitis Asthma Cancer Child Abuse and Maltreatment Cholelithiasis Chronic Liver Disease/Cirrhosis Delivery² Diabetes Dorsopathies Enteritis - Non-Infectious Heart Disease Hypertension - Uncontrolled Infection - Acute Respiratory Infection - Intestinal Infection - Septicemia Infection/Parasitic - Other Injury Mental Disorders Newborn² Pneumonia/Influenza³ Poisoning Rehabilitation² Rheumatic Fever Sickle Cell Anemia Stroke Urinary Disease - Nephritis, etc. Urinary Disease - Other All Other Diagnoses Unknown¹	540-543 493 140-208;235-239 995.5,V61.21 574 571 MS-DRG 765-768,774-775² 250 720-724 555-558 393-398;402;404-429 401, 403, 437.2 460-466 001-009 038 010-139 (exclude 038) 800-959 290-319 MS-DRG 789-795² 480-488³ 960-989 MS-DRG 945-946² 390-392 282.6 430-438 580-589 590-599	Diagnosis Grouping is for the most part based on ICD-9 codes for the principal diagnosis associated with the hospitalization. If the principal diagnosis value was missing from a record the next available diagnosis field was used. In addition, three of the diagnostic categories created are based on MS DRG codes².
Length of Stay (in days)	1 - 6 7 - 13 14 - 29 30 and more Unknown¹	The number of days a patient was hospitalized.	Identifies the length of time that patients were hospitalized, including outlier cases in which the degree of severity of the condition within the respective Diagnosis Related Group (DRG) required stays below or beyond the average length of stay.
Hospital Charges	$ 1.00-3,499.99 $ 3,500.00-6,499.99 $ 6,500.00-11,999.99 $ 12,000.00-35,999.99 $ 36,000.00-99,999.99 $ 100,000.00 or more Unknown¹	Identifies the hospital charges incurred during hospitalization.	Due to managed care contracting, payor discount arrangements, Medicare and Medicaid payment plans, and other agreements, charges reflect hospital billing only, not necessarily actual consumer payment. In addition, some services or items provided in the hospital may not be reflected in each hospital's charges due to contractual arrangements or limitations with other clinical providers, e.g., anesthesia, diagnostic testing, professional clinical services, etc.
Payor	Commercial Insurance/HMO Medicare Medicaid Self Pay Other⁴ Unknown¹	Indicates the primary source of expected payment for the hospital charges.
Time Period	1994-Q1 1994-Q2 1994-Q3 1994-Q4 … through 2015-Q3* * For this hospital discharge data set, diagnosis coding changed from ICD9 to ICD10 as of the 4th quarter 2015. Data are restricted currently to ICD9 coded hospital discharges, with a date range from 1994 Quarter 1 to 2015 Quarter 3.	Quarterly time frames based on the date of discharge from the hospital.
County of Residence	All 102 Illinois counties from ADAMS to … WOODFORD Out of Illinois Unknown¹	County of patient residence at the time of hospitalization.
Notes: ¹ The category of "Unknown" represents all values that were invalid entries, values recorded as "unknown," or when no values were entered for the field. ² The Center for Medicare & Medicaid Services moved away from diagnosis-related groups (DRGs) to Medicare Severity DRGs (MS-DRGs) effective October 1, 2007. Previously, DRG codes for Delivery were 370-375, for Newborns 385-391, and for Rehabilitation 462. ³As of October 1, 2009, a new ICD-9 code category was added to the Influenza code ('487'). The new code ('488') identifies the influenza virus when known (such as Avian influenza virus and H1N1). This query system has been updated to reflect this change where Cause of Hospitalization="Pneumonia/Influenza" . ⁴The payor category of "Other" includes Workers Compensation.

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