Methods for Creating Respiratory Conditions:

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) discharge diagnostic codes listed in the Acute Respiratory Index (ARI) were used as a starting point to define respiratory conditions. For a list of diagnostic codes included in the ARI metric, visit the Acute Respiratory Illness Technical Brief.

These codes were further refined to exclude pathogen-specific codes and, when appropriate, were grouped using ICD-10-CM parent codes and Clinical Classifications Software Refined (CCSRs) categories, which organize ICD-10-CM codes into 14 clinically meaningful categories.

Short codes listed capture all codes underneath them (e.g., J09 includes J09.X1–J09.X9).

Findings for each of the 14 condition categories were analyzed by age group.

Source: National Syndromic Surveillance Program (NSSP)

The NSSP is a collaboration among CDC, local and state health departments, and private sector partners. Together, these partners collect, share, and analyze automated electronic healthcare data in near-real time.

National data include emergency departments in all 50 states, the District of Columbia, and Guam. View the Coverage Map.