Asthma

Data are for the U.S.

Morbidity
  • Number of adults aged 18 and over who currently have asthma: 19.2 million
  • Percent of adults aged 18 and over who currently have asthma: 7.7%

Source: Summary Health Statistics Tables for U.S. Adults: National Health Interview Survey, 2018, tables A-2b, A-2c pdf icon[PDF – 137 KB]

  • Number of children under age 18 years who currently have asthma: 5.5 million
  • Percent of children under age 18 years who currently have asthma: 7.5%

Source: Summary Health Statistics Tables for U.S. Children: National Health Interview Survey, 2018, tables C-1b, C-1c pdf icon[PDF – 99 KB]

Physician office visits
  • Number of physician office visits with asthma as a primary diagnosis: 9.8 million

Source: National Ambulatory Medical Care Survey: 2016 National Summary Tables, tables 15 pdf icon[PDF – 793 KB]

Emergency department visits
  • Number of emergency department visits with asthma as a primary diagnosis: 1.6 million

Source: National Hospital Ambulatory Medical Care Survey: 2017 Emergency Department Summary Tables, table 12 pdf icon[PDF – 863 KB]

Mortality
  • Number of deaths: 3,564
  • Deaths per 100,000 population: 1.1

Source: Deaths: Final Data for 2017, Supplemental Tables, tables I-12, I-13 pdf icon[PDF – 1.93 MB]

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Page last reviewed: February 21, 2020