A warrant was issued Friday by the Los Angeles Police Department to do a toxicology blood test on Heche, 53, Officer Annie Hernandez told USA TODAY Monday.
"The investigation is pending based on the results," Hernandez added.
Heche remains hospitalized after crashing her Mini Cooper into a home Friday morning in Los Angeles, where she was pulled from the burning car.
"Anne is currently in stable condition," her friend Heather Duffy Boylston told The Associated Press Saturday. The "Another World" actress' family and friends asked for well wishes and "to respect her privacy during this difficult time.”
USA TODAY has reached out to Heche's representatives for details.
Anne Heche's life before near-fatal wreck: Mental health struggles, Ellen DeGeneres romance, more
TV video showed a damaged blue Mini Cooper Clubman being towed as firefighters put a woman in an ambulance.
The Los Angeles Fire Department said in a news release that the vehicle struck a two-story home, causing "structural compromise and erupting in heavy fire."
Fifty-nine firefighters responded to the incident and took 65 minutes to extinguish the flames and rescue Heche. No other injuries were reported.
Anne Heche hospitalized: Actress in 'stable' condition after fiery car crash in Los Angeles
Anne Heche talked 'bad days' in podcast episode released a day before car crash
Heche detailed having a bad day to Duffy on their "Better Together" podcast, released the day before the crash. The episode was recorded Tuesday, several days before it was aired, podcasting company Straw Hut Media told to USA TODAY.
The episode titled "Just the 2022 of Us" was removed from streaming services following the crash due to "inaccurate reporting that the episode was recorded on the day of the accident," Straw Hut Media rep Ryan Tillotson said. It is still posted on the Straw Hut website.
On the podcast, Heche said she had "a very unique day."
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"I don’t know what happened, sometimes days just suck, and I don’t know if you ever have them. … Some days are those no good very bad days. And I don’t know why some days just end up like this, and things don’t really rock me like that."
Heche and Duffy were drinking during the podcast, sharing that they "each have a bottle (of vodka) in front of us."
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Contributing: Lynn Elber, The Associated Press; Charles Trepany, Kim Willis and Bryan Alexander, USA TODAY
This article originally appeared on USA TODAY: Anne Heche tested for drugs and alcohol after car crash, police say