Definition: Number of hospital discharges for a primary diagnosis of asthma among children ages 0-17, by age group (e.g., in 2024, there were 3,195 asthma hospitalizations among California children ages 0-4).
Data Source: California Breathing, tabulation of data from the California Dept. of Health Care Access and Information (May 2026).
Footnote: Data are based on the number of hospitalizations, not the number of children hospitalized. Data are limited to hospital admissions; emergency department visits that do not result in admission are excluded. Transfers from one hospital to another are treated as separate hospitalizations. County-level data reflect the patient's county of residence, not the county in which the hospitalization occurred. Data for 2016 and later are based on International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code J45; data for 2015 and earlier are based on ICD-9-CM code 493. For this reason, data for 2016 and later cannot be compared with earlier years. The notation S refers to data that have been suppressed because there were, depending on the year, fewer than 5 cases (2014 and earlier), between 1 and 10 cases (2015-2019), or fewer than 11 cases (2020 and later) in that group. N/A means that data are not available or were not reported for that county individually.
