Lamar Odom's Father Claims the Kardashian Family Won't Allow Him to Visit His Son

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Lamar Odom's father is lashing out at Khloe Kardashian.

Though Joe Odom had previously been seen at Sunrise Hospital in Las Vegas, Nevada, while his NBA star son remained in critical condition, he now says that the Kardashians are preventing him from visiting Lamar at Cedars-Sinai Medical Center in Los Angeles, California.

WATCH: Kobe Bryant on Lamar Odom's 'Amazing' Progress: 'It Truly Is Remarkable'

"I'm mad because this is the second time I came to see my son and they won’t let me see my son," he told TMZ outside the medical facility on Wednesday. "Like I’m a villain or something... that's my son."

Lamar was found unresponsive at a Nevada brothel on Oct. 13. He was placed in a medically induced coma, but woke up a few days later at Sunrise Hospital. After showing signs of slight improvement, he was transported to Cedars-Sinai for further care.

Joe claimed that he has been told he's "not on the visitor list" to see Lamar. "They let other people see my son that's not even related to him," he added, declaring that he had "tried reaching out to everybody," including Khloe. Asked whether Khloe was the person preventing him from visiting, Joe said: "Yes, it's the Kardashians."

Meanwhile, Khloe had kept a near-constant vigil by Lamar's bedside as it was revealed that the estranged couple was legally still married. On Oct. 21, Khloe's lawyer filed to have Khloe and Lamar's divorce papers withdrawn.

"Khloe stopped the divorce from being finalized just so she can have power of attorney and make the medical decisions for him," a source close to Khloe tells ET. "Khloe is the one person Lamar has."

WATCH: Khloe Kardashian Focusing on Lamar Odom's Health Over a Relationship With Him 

Lamar's mother died of colon cancer when he was 12 years old, and his father has long struggled with addiction. Lamar's strained relationship with his father was documented on the reality show, Khloe & Lamar, which aired from 2011-2012. Aside from his father, Lamar's only immediate family consists of his two teenage children with his ex-girlfriend.

"Right now Lamar needs to be as calm and relaxed as possible, so letting Joe see him is the last thing he needs," ET's source continues. "[Khloe] knows how much he's hurt Lamar and she does not want him to do that again, especially right now."

Khloe fired back at critics over a recent People cover and interview to promote her new book, Strong Looks Better Naked. "Shame on you all for thinking the worst of me. It's been a tough few weeks. I don't need your f**ked up energy!" she tweeted. "Know the facts before you throw stones."

In her interview, Khloe gave a brief update on Lamar's health and the state of their relationship.

"The fact that he woke up was definitely a sigh of relief for everybody," Khloe said. "Every hour is different. It goes up and it goes down but he's awake. He's alive and that's all I wanted, was for him to be OK."

WATCH: Khloe Kardashian Lashes Out at Interview Backlash 

"There are too many other important things, too many medical things," she continued. "It's not even in our brains thinking about us as a couple or having a relationship right now."

Just last week, Khloe canceled her planned press tour to promote the new book in order to care for Lamar.

"I want to make this VERY clear.... My people cover, I shot and interviewed for PRIOR to all the events that happened," she wrote. "It was contracted press for my book that I wrote months and months ago. Timing is what it is."

She continued: "I had to do a follow up 5 minute phoner after the events only because I was contracted to. I cancelled my book tour to avoid this attention."

For more on how Khloe is coping with this difficult time, watch the video below.