0001815849 2024-12-12 2024-12-12 0001815849 us-gaap:CommonStockMember 2024-12-12 2024-12-12 0001815849 atip:RedeemableWarrantsExercisableForClassACommonStockAtAnExercisePriceOf57500PerShareMember 2024-12-12 2024-12-12 false --12-31 0001815849 8-K 2024-12-12 ATI Physical Therapy, Inc. DE 001-39439 85-1408039 790 Remington Boulevard Bolingbrook IL 60440 630 296-2223 false false false false Class A Common Stock, $0.0001 par value ATIP Redeemable Warrants, exercisable for Class A Common Stock at an exercise price of $575.00 per share ATIPW false