About the cold-related illness data

This page provides general information about cold-related illness data and measures developed by the Minnesota Tracking Program. For more information about these data, contact us.

Information on this page:

Hospitalizations/ED visits:

  • Minnesota residents who are hospitalized or visit the emergency department in the cold weather months (October-April) with a primary or other diagnosis of cold-related illness, defined as having any of the following ICD-9-CM codes: 991, E901.0, E901.8, E901.9, and E988.3 (excluding cases due to man-made cold exposure, ICD-9-CM code E901.1) and ICD-10-CM codes: X31, T68-69, or T33-34 (excluding cases due to man-made cold exposure, ICD-10-CM code W93).
  • The data source for hospitalizations and ED visits is the Minnesota Hospital Discharge Data. The Minnesota Hospital Discharge Data collects hospital discharge information from acute care hospitals submitting data to the Minnesota Hospital Association (MHA).
  • Hospitalizations include out-of-state hospitalizations of Minnesota residents in the nearby states of North Dakota, South Dakota, and Iowa. ED visits only include out-of-state hospitalizations of Minnesota residents after the year 2005.

Deaths:

  • Minnesota residents deceased during the cold weather months (October-April) with ICD-10-CM codes X31, T68-69, or T33-34 (cold-related illness) listed as an underlying or contributing cause of death on the death certificate record (excluding intentional deaths and deaths due to man-made cold exposure, ICD-10-CM code W93).
  • Demographic and cause of death data are collected from death certificates. Minnesota Mortality Data is maintained by the Center for Health Statistics at MDH.
  Code Description
  X31 Exposure to excessive cold of natural origin
  T33 Superficial frostbite
  T34 Frostbite with tissue necrosis
  T68 Hypothermia
  T69 Other effects of reduced temperature

 

  • Learn more about the ICD-10-CM codes from the International Statistical Classification of Diseases 10th Revision

To learn more about cold-related illness data and measures, contact the MN Environmental Public Health Tracking Program at health.dataportal@state.mn.us.