'Star Trek' actor Walter Koenig's cause of death revealed

Los Angeles Times • November 4, 2026 • entertainment

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Walter Koenig, known for playing Pavel Chekov in the original "Star Trek" series, died at age 90 on October 25, with cardiopulmonary arrest listed as the immediate cause of death.
Chronic diastolic congestive heart failure was an underlying cause, and acute renal failure was a significant contributing condition, according to his death certificate.
Koenig was cremated on October 30, and his representative confirmed he died of natural causes, surrounded by family.
Koenig's career spanned beyond "Star Trek," including his role as Alfred Bester in "Babylon 5," and he was celebrated for his optimism, humor, and connection with fans.
He first appeared as Chekov in the second season of "Star Trek" and reprised the role in seven subsequent films, becoming a beloved figure in the franchise's community.