Immigrants used hospital care relatively rarely – in fact, admission rates were around half that of English-born people of the same age and sex. Rates were most similar for obstetrics and neonatal care, but even then they were still lower for immigrant women of childbearing age than for similarly-aged English-born women.
The patterns of lower admission rates among international migrants to England persisted for at least three years after their initial registration with a GP. And they were similar for three different cohorts of international migrants that we studied (arrivals in 2003/4, 2004/5 and 2005/6) – so before and after the Eastwards expansion of the European Union in May 2004.
It's an overblown stat - as with many things relating to immigration, they're a net gain to the NHS rather than a drain. They are a percentage of the NHS overall use, sure, but it's a fair price to pay for the benefits they give.
As Bennett just said, 1 in 4 doctors and 40% of NHS staff are foreign born apparently. Not sure those stats are true, but they're up there.