Research Letter

Trends in Vitamin K Administration Among Infants

JAMA 10.1001/jama.2025.21460

December 08, 2025 at 11:00 AM EST

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This study evaluates whether the proportion of newborns in the US not receiving intramuscular vitamin K has increased in recent years and identifies factors associated with nonreceipt.

Corresponding Author: Kristan Scott, MD, Division of Neonatology, Children’s Hospital of Philadelphia, 3401 Civic Center Blvd, Main 2NW, Philadelphia, PA 19104-4399 (scottk8@chop.edu).

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