Some of the blast casualties are expected to undergo more surgery over the weekend, doctors say.
More than 700 people were injured in the London blasts
Fewer than 70 people remain in hospital, many having had operations after losing limbs, and suffering burns and multiple body injuries.
But doctors said some would need more surgery. Four people are also being treated in a specialist burns unit.
Over 700 people were hurt and at least 50 died. People worried about relatives or friends should call 0870 1566 344.
Hospitals called in extra staff and cancelled non-urgent surgery to free up theatres to deal with the injured under their emergency plans, but all hospitals have now returned to normal working conditions
Professor Jim Ryan, a senior A&E consultant at University College Hospital, which is still treating 15 people, said: "Most of the operations are on limbs. You have penetrating wounds, indented stone, debris, glass or metal.
"There is also head injury management, and lung inhalation and injuries to the chest."
He added many of the patients would be facing further surgery and complex care.
The Royal London Hospital, near Liverpool Street Station, said it was still treating 17 patients, seven who were in intensive care.
Alastair Wilson, A&E clinical director at the hospital, said: "There is still a lot of surgery to be done, probably over this weekend."
Chelsea and Westminster Hospital has also admitted six casualties for treatment in their specialist burns unit.
A spokeswoman said they would be assessed by a team of plastic surgeons before any decision was taken on their treatment.
The Royal Free Hospital in north London said it was still treating eight people and all were in a stable condition.
And St Mary's Hospital in Paddington is treating five people. All were in a stable condition with two said to be critical.
Thirteen people are still at Guy's and St Thomas's, near Waterloo, one in a critical condition but stable.
A spokeswoman said: "Patients are being treated for smoke inhalation, burns and serious limb and chest injuries."
And Great Ormond Street Hospital for Children, which set up makeshift facilities under its major incident plan as it does not have an A&E department, still has two casualties.
Charing Cross Hospital has one casualty who was transferred from St Mary's.
Home Secretary Charles Clarke said: "There are a number of people terribly injured in hospital still and we don't know how they're going to survive or not."
Casualties have received visits from Health Secretary Patricia Hewitt, The Queen and Prince Charles.
Speaking at the Royal Free Hospital, Ms Hewitt praised the NHS response, saying hospitals were "almost immediately ready and could have coped with far more people had they needed to".
WHERE THE CASUALTIES WERE TAKEN
1 University College Hospital - 58 seen; 15 remain; 5 in intensive care
2 Great Ormond Street - 22 brought in; two remain
3 Royal London - 208 seen; 17 remain; seven in intensive care
4 Guy's and St Thomas' - 22 brought in; 13 still there
6 St Mary's - 38 seen; 5 remain; two critical
7 Royal Free - 61 brought in; 8 remain, five of whom had surgery
8 Chelsea and Westminster - six in burns unit