Coronavirus-related deaths were 41% higher in England and Wales than the government's hospital-only figures in the week to 10 April.
The new statistics, revealed in an Office for National Statistics report, take into account deaths outside of hospitals.
Overall, 13,121 deaths involving COVID-19 have occurred in England and Wales up to 10 April, and registered up to 18 April, which is 41% higher than the 9,288 people who died in UK hospitals during the same period reported by the Department of Health.
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The figures have been labelled "sad and shocking", with Labour saying they were "only scratching the surface of the emerging crisis in social care".
Ministers have promised to ramp up testing for social care workers and residents, pledging tests for all those who need them, as well as improving access to vital protective equipment.
And following demands for the government to set out daily figures for care home deaths, the ONS will from next week publish totals of deaths involving COVID-19 in care homes, with the figures based on deaths reported by care home operators to the Care Quality Commission.
The latest ONS weekly total shows that there were 1,662 deaths involving the coronavirus in England and Wales registered up to 10 April that happened outside of hospital.
Of the deaths outside hospitals 1,043 happened in care homes, up from 217 the week before.
A further 466 occurred in private homes, 87 in hospices, 21 in other communal establishments and 45 elsewhere.
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According to the ONS, the numbers are based on where the coronavirus is mentioned anywhere on the death certificate, including in combination with other health conditions.
The previous weekly figures, up to 3 April, showed that a total of 406 registered deaths involving COVID-19 happened outside of hospitals, around 10% of the total.
A total of 217 were registered in care homes, 33 in hospices, 136 in private homes, three in other communal establishments and 17 elsewhere.
This week's figures show that the proportion of deaths outside of hospitals now stands at 16%, with 83.9% (8,673) occurring in hospitals.
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According to the ONS, there were 12,516 deaths involving the coronavirus in England up to 10 April (and which were registered up to 18 April).
NHS England reported 10,260 deaths in hospitals in England for the same period, with the ONS total 22% higher.
This disparity is because the ONS statistics include all mentions of COVID-19 on a death certificate and deaths in the community, while NHS England only include deaths in hospitals where a patient has been tested for the virus.
Labour's shadow social care minister Liz Kendall said the figures demonstrate the "terrible toll" that the virus is having on elderly and disabled people in care homes.
"Yet these awful figures are only scratching the surface of the emerging crisis in social care, because they are already 11 days out of date," she said.
"The government must now publish daily figures of COVID-19 deaths outside hospital, including in care homes, so we know the true scale of the problem.
"This is essential to tackling the spread of the virus, ensuing social care has the resources it needs and getting vital PPE and testing to care workers on the frontline."
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Cllr Ian Hudspeth, chairman of the Local Government Association's Community Wellbeing Board, described the latest statistics as "sad and shocking".
He said they "highlight just what a severe challenge we face in care homes and other community settings".
Cllr Hudspeth added: "Council social care staff and care homes need urgent access to reliable and ongoing supplies of quality PPE [personal protective equipment], increased rapid and comprehensive testing and greater support with staffing and other equipment, on an equal footing with the NHS.
"Data on all deaths from COVID-19 needs to be published promptly and accurately, so we can have full confidence and transparency in these figures as part of our plan to defeat this deadly virus."
Of the deaths that were registered in the week up to 10 April, 6,123 mentioned "novel coronavirus (COVID-19)" - around a third of all deaths.
In the week up to 3 April, this figure stood at 3,475 deaths (21.2% of all deaths).
The ONS said a steep rise in coronavirus-related care home deaths had seen the overall number of deaths in that setting double in four weeks.
From when the first COVID-19 deaths were registered and the week ending 10 April, the number of deaths in care homes has doubled from 2,471 to 4,927.
Overall, care home deaths comprised more than a quarter (26.6%) of all deaths registered in the week ending 10 April.
Meanwhile, there has been a 72.4% increase in hospital deaths (4,975 to 8,578) and a 51.1% increase in deaths happening in private homes (2,725 to 4,117).
https://news.sky.com/story/coronavi...overnments-hospital-only-figures-ons-11976357