Lamar Odom reportedly is on a steady path of improvement.

Odom, who suffered a drug overdose last Tuesday, awoke in the hospital from his coma and spoke Friday morning -- which was considered an incredible and shocking recovery -- but he'll need "a lot" of rehab in the coming months and it remains unknown whether there is permanent damage, E! News reported.

Odom, 35, is "making fast progress" and can move his arms and legs. He's also been speaking in small phrases to his estranged wife Khloe Kardashian, who has been at his side through the whole ordeal. Odom said "good morning" to her on Monday.

A CT scan allegedly came back clean and Odom is showing neurological function by passing a swallowing test and communicating with hand signals. The former NBA basketball star is also "doing great with his breathing" after taking off his oxygen mask for good, according to E! News.

However Odom is still unable to stand on his own even with assistance. He's reportedly on dialysis dealing with kidney failure and could face cognitive issues in the future.

Odom's maternal aunt, JaNean Mercer, released a statement on Monday to E! News about his condition.

"Lamar has always been blessed with a tenacious, fighting spirit, overcoming insurmountable obstacles to achieve the impossible. These past few days have been no different. He is defying the odds in his toughest battle to date with God's grace. Each day Lamar is getting stronger and reaching significant milestones in his recovery," Mercer said.

"We are committed to remaining by his side as a family for our champion, who we love immensely. Your continued prayers and well wishes have been the fuel to keep us going, and for that we are eternally grateful."

Odom is currently surrounded by a team of doctors including a neurologist, cardiologist, primary care doctor and critical care physician. TMZ also reported he'll have physical and speech therapists at his aid.

Kardashian has remained "quiet and concerned" while continuing to ask all the right questions, according to TMZ. The Keeping Up with the Kardashians star allegedly vows to stay with Odom in the tough days ahead. The situation will be a surefire test for Kardashian's current romance with James Harden.