Death Certificate-Based ICD-10 Diagnosis Codes for COVID-19 Mortality Surveillance - United States, January-December 2020

Among 378,048 death certificates from 2020 listing COVID-19 as a cause of death, 5.5% listed COVID-19 without codes for any other conditions. Among 357,133 death certificates with at least one other diagnosis, 97% had a co-occurring diagnosis of a plausible chain-of-event condition, a significant contributing condition, or both.

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