A couple from Northampton will appear in an American court for bail hearing later.
Paul and Sandra Dunham lost their battle against extradition on fraud charges.
They were taken to Northampton General Hospital after trying to take an overdose the night before they were due to hand themselves over.
Mr Dunham's charged with 13 counts of fraud and money laundering.
Retired British couple Paul and Sandra Dunham have been extradited from the UK to the United States to face fraud charges, Scotland Yard has said.
The transfer of the husband and wife, both 58, was delayed after they tried to take their own lives last week prior to a previously scheduled extradition.
The pair took an overdose - later described by a judge as a "cry for help" - the night before they were due to hand themselves into police to be handed over to US marshals at Heathrow Airport.
The grandparents were today received by the American officials at the airport's Terminal Four and departed on a flight around 2.15pm. They deny the allegations against them.
Paul and Sandra Dunham are to be extradited to the US today.
The couple from Northampton were taken to hospital last Thursday after they took a drug overdose the night before they were due to hand themselves in to police ahead of being taken to US marshals at Heathrow Airport.
They were remanded in custody at Westminster Magistrates' Court on Friday after Senior District Judge Howard Riddle concluded they had taken the drugs deliberately to avoid or delay their extradition to face fraud charges.
Their solicitors have today confirmed the couple will be extradited to Maryland.
The couple lost a High Court battle last month against extradition to stand trial over fraud charges relating to Mr Dunham's company, Pace. The couple deny the charges.
Journalists waiting outside the Northampton home of a couple facing extradition to America called police when they didn't answer knocks at their door.
Paul and Sandra Dunham were due to fly to the US to face charges of fraud and money laundering. They deny the allegations.
When police arrived they were forced to break into the property. Ambulances were then called to take two people inside the house to hospital.
Police officers used a battering ram to gain entry to the home of a Northampton couple facing extradition to the United States.
Paul and Sandra Dunham were due to be flown to America where they face charges of fraud and money laundering. They deny the allegations against them.
Shortly after officers entered the house two ambulances arrived and two people were taken to hospital.
Northamptonshire police say they were called to the house after concerns were raised about the welfare of the occupants.
Two people are being taken to Northampton General Hospital.
Police attend the property at approximately 7.15am, forced entry and called paramedics.
A couple from Northampton who were due to be extradited to the US have been taken to hospital this morning.
Police went to the home of Paul and Sandra Dunham just after 7am and had to force their way in. More to follow.
A retired couple from Northampton have been told they will be handed over to US Marshals at Heathrow Airport on Thursday for extradition to America on fraud charges.
Paul and Sandra Dunham lost a High Court battle last month to block their extradition.
58-year-old Mr Dunham was chief executive and president of a US electronics company.
He has been indicted on 13 counts of fraud and money laundering by an American grand jury.
Mrs Dunham faces eight counts. The couple deny the allegations.
"Yesterday was mostly taken up by speaking to friends and family who are as shocked and devastated as we are," Mr Dunham told ITV News Anglia.
"We're desperately trying to find a home for our dogs because you know we hadn't planned any of that."
A retired British couple have been ordered to hand themselves in to police ahead of being sent to the United States to face fraud charges.
Paul and Sandra Dunham lost a High Court battle last month to block their extradition to Maryland after a request by the Department of Justice sought their extradition over what the couple claim is an "employment-related dispute".
Mr Dunham, 58, who was chief executive and president of Pace, a US company manufacturing soldering irons for the electronics industry, was indicted on 13 counts of fraud and money-laundering by a grand jury in Greenbelt, Maryland, in December 2011.
Mrs Dunham, also 58, is accused of eight counts of fraud for allegedly aiding and abetting him.
A statement released on behalf of the couple said today:
"Paul and Sandra Dunham have been told by the Met Police's extradition unit to report to Belgravia police station at 10am this Thursday, May 15, for onward transportation by the police to Heathrow where they will be handed over to US marshals and extradited to the US."
The couple "vehemently reject" allegations relating to expenses claims while working in the US.