Data Sources

Find more information about each type of map created with the Interactive Heart Disease and Stroke Atlas.

Data Sources

  • Deaths National Vital Statistics System. Bridged-Race Postcensal Population Estimates from National Center for Health Statistics.
  • Hospitalizations and hospitalization discharge status. Centers for Medicare and Medicaid Services Medicare Provider Analysis and Review (MEDPAR) file, Part A.

ICD Codes

Mortality: International Classification of Diseases, 10th Revision (ICD-10) codes:

  • All Heart Disease: I00-I09, I11, I13, I20-I51; underlying cause of death.
  • Coronary Heart Disease: I20-I25; underlying cause of death.
  • Acute Myocardial Infarction: I21-I22; underlying cause of death.
  • Cardiac Dysrhythmia: I47-I49; underlying cause of death.
  • Heart Failure: I50; deaths with heart failure mentioned in any of the 20 listed causes of death on the death certificate.
  • Hypertension: I10-I15; deaths with hypertension mentioned in any of the 20 listed causes of death on the death certificate.
  • All Stroke: I60-I69; underlying cause of death.
  • Ischemic Stroke: I63, I65-I66; underlying cause of death.
  • Hemorrhagic Stroke: I60-I62; underlying cause of death.

Hospitalizations: International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) codes.

  • All Heart Disease: 390-398, 402, 404, 410-429; principle (i.e., first-listed) diagnosis.
  • Coronary Heart Disease: 410-414, 429.2; principle (i.e., first-listed) diagnosis.
  • Acute Myocardial Infarction: 410; principle (i.e., first-listed) diagnosis.
  • Cardiac Dysrhythmia: 427; principle (i.e., first-listed) diagnosis.
  • Heart Failure: 428; principle (i.e., first-listed) diagnosis.
  • Hypertension: 401-405; principle (i.e., first-listed) diagnosis.
  • All Stroke: 430-434, 436-438; principle (i.e., first-listed) diagnosis.
  • Ischemic Stroke: 433-434; principle (i.e., first-listed) diagnosis.
  • Hemorrhagic Stroke: 430-432; principle (i.e., first-listed) diagnosis.

County estimates of Diagnosed Diabetes, Obesity, and Leisure-time Physical Inactivity were calculated by the Division of Diabetes Translation. Learn more about the data and statistical methods. Additional data and statistical methods can be found here: https://www.cdc.gov/diabetes/data/county.html

Data sources are shown on the map and include a variety of national publicly available data (e.g., US Census Bureau). Data are available at the county and census tract level. The years represented by the data are shown in the title bar.

  • Data sources are shown on the map and include a variety of national publicly available data (e.g., Health Resources and Services Administration Area Health Resources Files). Data are available at the county level. The years represented by the data are shown in the title bar.
  • Blood Pressure Medication Nonadherence, defined as a proportion of days a beneficiary was covered with blood pressure medication of <80%, was assessed using prescription drug claims data among Medicare Advantage or Medicare fee-for-service beneficiaries aged ≥65 years with Medicare Part D coverage. More information is available at Vital Signs https://www.cdc.gov/vitalsigns/blood-pressure/index.html.
  • Hospitals are shown as the number of hospitals per county. Physicians and specialists and pharmacies are shown as either the population per physician or the number of pharmacies per population.

The data used are from the Centers for Medicare and Medicaid Services’ (CMS) Chronic Conditions Data Warehouse.

Learn more about the Health Care Costs data.