In one trust, Pennine Acute Hospitals NHS Trust, the number of such appointments dropped by 38 per cent; while at Ealing Hospital NHS Trust they fell by 27 per cent.
Doctors are concerned the reductions, revealed by Pulse, a magazine for GPs, jeopardise patient care.
The situation seems to be affecting the whole country, with some health authorities instigating percentage cuts to the number of follow-up appointments they are prepared to fund.
NHS Gloucestershire has told doctors it will be funding 900 fewer rheumatology follow-ups, with dermatology, urology and other departments also affected, according to the county's local medical committee (LMC). The trust has refused to say what they amount to in percentage terms.
Dr Philip Fielding, chair of Gloucestershire LMC, said members were "concerned patients with chronic conditions could be prejudiced by being discharged to GP practices where there might be neither the skill nor the capacity to treat them".
He added: "This is another of the games hospitals play to save money. Readmissions are obviously a concern because they are more expensive than follow-up appointments. Everything has workload implications for primary care at the moment. There comes a time when enough is enough."
Sir David Nicholson, chief executive of the NHS, has demanded the service makes "efficiency gains" of up to £20 billion by March 2015.
This is translating into a myriad of cuts, such as stipulating that patients need to demonstrate worse physical hardship before qualifying for pre-planned operations like hip replacements.
The Department of Health is trying to distance itself from such behaviour.
On Monday Andrew Lansley, the Health Secretary, said managers would be banned from rationing treatments so that patients died or went private first, as highlighted in a damning report by the NHS Co-operation and Competition Panel earlier this year.
A Department of Health spokesman said: "All patients with a clinical need for a follow-up appointment in hospital should have one. We have not set targets to reduce the number of follow-up appointments and have no plans to do this."
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