Bail was set at $250,000 Wednesday for Alyia Iverson, 26, of Spanaway. She pleaded not guilty at a court appearance in Tacoma.
Iverson's son was 2 1/2 when he died in December 2012. Investigators said his mother left methamphetamine where he could get at it and then did not get medical assistance for him until it was too late to save his life.
"Once the toddler ate that methamphetamine there must have been a high fever, convulsions, maybe even seizures. It would have been painfully obvious," Pierce County Prosecuting Attorney Mark Lindquist said.
Washington State's Child Protective Service, in a report on the boy's death, said that Iverson's children, including an older daughter, had been removed from her custody at one point but were returned to her, KIRO-TV reported.