Disgraced West Coast AFL player Ben Cousins was allegedly admitted to hospital in Los Angeles for substance abuse, the Nine Network reports.

Cousins was meant to be in Los Angeles for drug rehabilitation treatment, but according to Nine he was taken to hospital after a woman hosting him at her apartment became worried about his condition and called an ambulance.

Cousins returned to Australia earlier this week from the US, where he had gone for rehabilitation treatment after his sacking by the West Coast Eagles.

His whereabouts on Friday night were unknown.

Nine said Cousins had been staying at a woman's apartment in the Los Angeles suburb of Hermosa Beach.

He arrived on Saturday, October 27 and the call was made on the following Wednesday at 5.13am local time.

The woman told the operator a 29-year-old male on cocaine "was not acting right but was breathing and conscious", according to the official ambulance call sheet.

She also said the man had been on cocaine for the past five days, according to Nine.

"He's not being violent. He's just scared," she said.

An ambulance and two officers arrived and the man was taken to the Little Company of Mary Hospital, according to Nine.

The hospital has confirmed Cousins was a patient, the network reported.

He checked out two days later and then belatedly checked into a drug rehabilitation clinic, where he stayed for two days before returning to Australia.

Reports Cousins had gone missing in Los Angeles and not checked into rehabilitation were rejected late last week by his father, Bryan Cousins.

Mr Cousins accused the media of fabricating stories about his son being missing, potentially hampering his drug rehabilitation treatment.

Cousins was sacked by West Coast last month after a string of off-field incidents, some of them drug-related.

The final straw came when the Brownlow medallist's car was pulled over by police in central Perth last month, days after the funeral of his friend, former West Coast player Chris Mainwaring, who died in mysterious circumstances on October 1.

Cousins was later charged with refusing to submit to a driver assessment. Drugs, later found to be prescription drugs, were found in the vehicle.

A drug possession charge was dropped and a Perth magistrate adjourned the case so Cousins could return to the US for another stint of drug rehabilitation.

Cousins has since been charged by the AFL with bringing the game into disrepute.

Cousins was suspended indefinitely by West Coast just before the 2007 season and underwent several weeks of drug rehabilitation in the US.

The former club captain returned to the game midway through the year after agreeing to stringent contract conditions, including that he not test positive to drugs or fall foul of the law.

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