Lamar Odom has awoken from his coma and is reportedly slowly recovering, although doctors do not yet know the extent of the damage done to his body.

Odom was hospitalized Tuesday after being found unconscious at a Nevada brothel. He reportedly had several drugs in his system, including opiates and cocaine, and several of his organs had begun to shut down.

The former NBA player and estranged husband of reality TV star Khloe Kardashian awoke from his four-day coma on Friday and continued to make progress on Saturday, according to People. But a source told the magazine that “he’s not out of the woods yet.”

“He still has a lot of problems with his internal organs,” the unnamed source said. “His kidneys are a big worry. He has done a lot of damage to his body. He will probably never be back to where he was before. Damage has been done.”

Odom has received a steady stream of visitors at his hospital bed, including the extended Kardashian family, Lakers general manager Mitch Kupchak and Kobe Bryant and the Clippers’ Blake Griffin, Chris Paul, and DeAndre Jordan.

The source told People that Khloe Kardashian “hasn’t left his side,” and that “as soon as Lamar wakes up, she rushed over to hold his hand.”

Kim Kardashian posted an old photo to Instagram Saturday expressing gratitude for Odom’s recovery.

“I have faith in you,” Kim wrote. “I believe in the power of prayer and positive energy! Thank you all for your prayers! Lammy- I’m so happy Kendall & I could make you smile today! God is good!”