Opposition's key debate will call for internal assessment of risks as the health bill passes through the House of Lords

Labour has been granted an emergency House of Commons debate on Tuesday in which it will call for the publication of an internal assessment of the risks posed by the proposed reform of the NHS.

Andy Burnham, the shadow health secretary, said the debate would show the "weight of feeling" against the health and social care bill, which will hand around 60% of the NHS budget to new GP-led commissioning groups in England.

The 90-minute debate, granted by the Commons Speaker John Bercow under the emergency Standing Order 24 provisions, will lead to a slight delay in what should be the bill's final stage in the Commons.

The bill returns after it completed its last stages in the upper house on Monday night after Tory and Liberal Democrat peers defeated two last minute challenges.

A final bid by Labour to block the bill's passage was defeated by 269 to 174 – a government majority of 95. Lord Greaves was the only Lib Dem peer to vote with Labour, as 73 of his party colleagues joined forces with 170 Tories to support the bill.

Lord Owen, the former SDP leader, also failed in an earlier attempt to delay the third reading of the bill in the upper house until the risk register is published. Owen was defeated by 328 votes to 213, a government majority of 115.

In calling for the bill to be delayed, Labour's health spokeswoman, Lady Thornton, warned that the reforms would "lead to the fragmentation and marketisation of the NHS and threaten its ethos and purpose". But Earl Howe, the health minister, pointed out that he had moved or accepted 375 amendments from all sides in the upper house.

Labour will seek to embarrass the government in the Commons when Burnham points to the information rights tribunal, which last week ruled that the NHS risk register should be published.

The government has said it cannot decide whether to comply with the ruling until it has seen the reasons behind it. John Angel, principal judge at the tribunal, is racing to publish his reasoning. The government can appeal on a point of law, but not on fact.

Burnham said: "People care passionately about the NHS and they have a right to know the full implications of the proposed reorganisation.

"This government is insulting parliament by expecting it to support these plans whilst withholding information that could change the way MPs vote."

John Healey, the former shadow health minister, who has pursued this issue for months, made the original request for the risk register in November 2010, and has argued the case with the government, the information commissioner and the courts.

Both ruled the government must release it. The government has not ruled out employing its special veto (only used once before, to stop release of the attorney general's legal advice on the Iraq war).

Ministers argue they cannot release the register because they fear it will jeopardise confidential advice to ministers. There is also a fear that the public will not understand, and mistake a worst-case scenario for a prediction.