Illinois Department of Public Health

  Opioid Data Dashboard

2017 Mortality data are provisional and are subject to change.

Dashboard Tutorial

Mortality and Morbidity Dashboard

"Overdose rate" is the rate of opioid overdose per 10,000 population for all demographics in a given geographical area.

"Cause of overdose" is categorized into 1) overdoses involving heroin, and 2) overdoses involving all other opioids other than heroin. The "other opioids" category includes synthetic opioids (e.g., fentanyl) as well as prescription medications (e.g., oxycodone, hydrocodone) whether obtained legally or illicitly. There is some amount of overlap in classifying causes of overdose, as overdoses involving mixtures of heroin and other opioids (e.g., an overdose involving heroin mixed with fentanyl) are counted under both categories. As a result, the total number of individual overdoses will be less than the sum of heroin overdoses and other opioid overdoses. The data source for nonfatal overdose is the IDPH discharge data collection system. This includes all hospital admissions and outpatient discharges with emergency department billing codes from 2013 to 2016. Fatal overdose data is sourced from death records collected by IDPH's Division of Vital Records. Overdose counts by ZIP combine both nonfatal and fatal overdose data.

For reasons of health information privacy and protection, overdose counts in geographical areas involving numbers less than 10 are "suppressed" (i.e., not provided) and instead marked with an asterisk*. Grayed out areas indicate that no overdoses occurred in that area in the selected year.

Trends Dashboard

For reasons of health information privacy and protection, overdose counts involving numbers less than 10 are "suppressed"(i.e., not provided). Suppressed data are marked with an asterisk* and/or indicated as "-1" in the hover panel. An overdose data point marked by an asterisk* and indicated as "-1" in the hover panel means that that the actual number of overdoses for that particular data point is between 1 and 9. An empty overdose data point with no asterisk and no hover panel means that the number of overdoses for that particular data point is 0.

Prescription Dashboard

MME = morphine milligram equivalent. Different types of opioids can vary significantly in dosage and potency. MME is a standard measure of the potency of an opioid, which converts dosages of all opioids into the milligram equivalent of one medication "morphine" for ease of comparisons and risk evaluations. Daily dosages of >90MME per day are considered particularly high-risk for overdose, and CDC guidelines recommend avoiding, or at minimum very carefully justifying, such dosages. Co-prescription of opioids with benzodiazepines (e.g., Valium®, Xanax®) is also particularly dangerous, and studies have shown that the overdose death rate for patients receiving both types of medications can be up to 10 times higher than for patients receiving only opioid prescriptions.

ED Overdoses in 2019

Syndromic surveillance data includes all Illinois acute care hospital emergency department (ED) visits. Data presented in the dashboard is provisional. Data is submitted to IDPH in near real-time. County-level data includes visits based on where the patient lives in Illinois.

Definition of Overdose: Opioid overdoses are inclusive of heroin overdoses. Visits are classified as overdoses due to opioid and/or heroin based on searches of both chief complaint text and/or diagnosis codes. Based on CDC guidance, diagnosis codes for poisoning and intoxication are included, as well as diagnosis codes that indicate opioid abuse, when symptoms associated with overdose are also reported at the ED visit.

The definition for opioid overdose and heroin overdose are summarized in the tables below.

Limitations of the data:

  • Cause: Toxicology results are not available for use in identifying cause of overdose in syndromic data. Cause cannot be differentiated between prescription or illicit opioid overdoses, nor fentanyl use or contamination.
  • Timing. Submission and processing of ED data can lag by up to 24 hours before it is included in the analysis. Longer delays in reporting of diagnosis for a visit can affect the time it takes to identify a visit due to opioids, and may initially show a decrease in overdoses in recent days until all information is received.
  • Representativeness: Overdoses that occur in other settings (i.e. home, EMS, out of state) are not identified.
  • Methods: Differences between ED statistics from syndromic and hospital discharge data sources are due to variations in the methods of data collection and comparisons should not be made across data sets.
Table 1. Chief complaint and discharge diagnosis search terms for suspected opioid overdose
Variable Automatic inclusion? Specific terms
Inclusions    
Discharge Diagnosis - ICD-9-CM poisoning Yes 965.00, 965.01, 965.02, 965.09, E850.0, E850.1, E850.2 (also included terms with no period, e.g., "96500")
Discharge Diagnosis - ICD-10-CM poisoning Yes T40.1X1A, T40.1X4A, T40.0X1A, T40.0X4A, T40.2X1A, T40.2X4A, T40.3X1A, T40.3X4A, T40.4X1A, T40.4X4A, T40.601, T40.604, T40.691, T40.694 (also included terms with no period, e.g., "T401X1A")
Discharge Diagnosis - ICD-10-CM opioid abuse/dependence/use with intoxication Yes F11.12, F11.120, F11.121, F11.122, F11.129, F11.22, F11.220, F11.221, F11.222, F11.229, F11.92, F11.920, F11.921, F11.922, F11.929 (also included terms with no period, e.g., "F1112")
Discharge Diagnosis - SNOMED Yes 295174006, 295175007, 295176008, 295165009, 242253008, 297199006, 295213004
Chief complaint - narcan or naloxone Yes Naloxone (narcan, evzio)
Chief complaint - overdose term No, must use in combination with opioid term Poisoning (poison) Overdose (overdose, overdoes, averdose, averdoes, over does, overose)
Nodding off
Snort
Ingestion (ingest, injest)
Intoxication (intoxic)
Unresponsive (unresponsiv)
Loss of consciousness (syncopy, syncope)
Shortness of breath (SOB), short of breath
Altered mental status (AMS)
Chief complaint - opioid term No, must use in combination with overdose term opioid, opiod, opoid, opiate, opate, opium, opium, opum, heroin, herion, heroine, HOD, speed ball, speedball, dope, methadone, suboxone, oxyco, oxy, oxyi, percoc, vicod, fent, hydrocod, morphin, codeine, codiene, codene, oxymor, dilaud, hydromor, tramad, suboxin, buprenorphine, and other common opioid brand and generic names
Discharge Diagnosis - ICD-10-CM opioid abuse/dependence/use No, must use in combination with overdose term F11.10, F11.90, F11.20
Exclusions    
Chief complaint Exclude See list below in ESSENCE code (many exclusions were required for "oxy" and "fent")

Table 2. Chief complaint and discharge diagnosis search terms for suspected heroin overdose
Variable Automatic inclusion? Specific terms
Inclusions    
Discharge Diagnosis - ICD-9-CM poisoning Yes 965.01, E850.0 (also included terms with no period, e.g., "96501")
Discharge Diagnosis - ICD-10-CM poisoning Yes T40.1X1A, T40.1X4A (also included terms with no period, e.g., "T401X1A")
Discharge Diagnosis - SNOMED Yes 295174006, 295175007, 295176008
Chief complaint - overdose term No, must use in combination with opioid term Poisoning (poison)
Overdose (overdose, overdoes, averdose, averdoes, over does, overose)
Nodding off
Snort
Ingestion (ingest, injest)
Intoxication (intoxic)
Unresponsive (unresponsiv)
Loss of consciousness (syncopy, syncope)
Shortness of breath (SOB), short of breath
Altered mental status (AMS)

Rx = "prescription"