The father of a Melbourne teenager who died on his 17th birthday after being sent back to bed by paramedics, has spoken about the awful moment the boy's mother found him dead.

Caleb Pearson died in bed last Wednesday after he was treated by paramedics at home - but the medical staff refused to take him to the emergency department.

His father Karl told the TODAY Show his wife Deb had been called home by their youngest child that day as Caleb's condition worsened.

Mr Pearson said Mrs Pearson had felt belittled by the paramedics.

"She would have liked (Caleb) to have gone with them, but they said no, it's just a virus, nothing we can do," he said.

Caleb Pearson. (Supplied)

Mrs Pearson then called a home doctor service in the hopes of having her concerns heard.

"She thought if she rang the doctor, he'd take her seriously," Mr Pearson said.

However, before the doctor arrived, Caleb was found dead.

"While she was waiting for them to call back, she was checking on him every five minutes and about half an hour later she found him passed away in there," Mr Pearson said.

Caleb with his younger brother. (9NEWS) (9NEWS)

An autopsy was conducted on Tuesday, but results could take up to 10 weeks to emerge.

Mr Pearson said he hoped the tragedy led to an improvement in the system, with more attention paid to parental concerns.

"If there's just a one percent chance something like this can happen - you don't want anyone else to go through this," he said.

He said his family was still struggling to come to terms with the loss, particularly his wife.

"What I'm going through isn't easy, but what she went through - finding him, performing CPR on him..." he said.

On Friday May 22, Caleb complained of a sore throat. He was taken to visit a GP the following Monday, where he was given antibiotics for what the doctor believed was a virus.

Caleb's mother stayed at home with her son on that Monday and Tuesday, and on Wednesday, Caleb suggested his mother to go back to work.

Caleb's brother called his mother that afternoon to tell her she needed to come home urgently as Caleb's condition was much worse.

She tried to get her son to stand up so she could take him to the hospital, but he was too weak and collapsed.

Caleb's younger brother called his Mum at work to say his condition had gone downhill fast. (9NEWS) (9NEWS)

Paramedics were called, but when they arrived they said Caleb was suffering from a virus, the hospital would not be able to do anything for him and should go back to bed.

Ambulance Victoria acting chief executive Tony Walker said an investigation will take place and paramedics are upset over the outcome.

"They're quite devastated by it. They've gone there doing the best they can and they never foresaw this. No one did," he said.

Mr Walker would not comment on whether the paramedics made a mistake by not taking the teenager to hospital.

"They applied, in their mind, the best judgement they could in making a clinical decision and I don't want to second guess that," he said.

"If there are mistakes made - I'm not saying there was in this case - we can learn from that."

Ambulance Victoria will wait for the coroner's report into Caleb's death before completing their internal review.