Frequent Use of Hematologic Testing in Children Admitted for Nonaccidental Trauma.

In 9561 admissions meeting inclusion criteria, laboratory testing was sent in 91.9% of encounters and expanded hematologic testing in 35.9% of encounters.

The most common expanded hematologic testing test being fibrinogen.

Expanded hematologic testing was associated with a significant increase in laboratory-associated charges.

Factors associated with expanded hematologic testing included hematology consultation, young age, higher income, and private health insurance.