When private hospitals transfer to the NHS

One of the more interesting and under-discussed features of UK healthcare is the relationship between private hospitals and the National Health Service (NHS). The two sectors look, from a patient's perspective, like separate systems. In reality, the private hospital sector operates inside a safety net that the NHS provides free of charge, and would not work without it.

Every year, somewhere in the region of 7,000 patients are transferred from private hospitals into the NHS because something in their care has become too complex, too acute, or too critical for the private facility to handle on site. This is not a scandal. It is how the system is designed. Private hospitals are built around a specific operational scope. The NHS is the national infrastructure for everything that sits outside that scope.

This article sets out what private hospitals are designed to do, what they typically do not have on site, how the transfer relationship with the NHS works, and what the pattern means for a patient choosing between sectors for a specific need. Sources are listed at the end.

What private hospitals are designed to do

A typical UK private hospital is configured around planned, elective, largely predictable work. The clinical services offered include:

• Planned elective surgery, including most common orthopaedic, general, urological, gynaecological, ENT, and ophthalmic procedures.

• Day surgery for shorter procedures that do not require an overnight stay.

• Consultant outpatient clinics for diagnosis, review, and follow-up.

• Diagnostic imaging, including ultrasound, X-ray, MRI, and computed tomography.

• Endoscopy and other investigative procedures.

• Rehabilitation, including physiotherapy.

• Single-room inpatient accommodation for recovery after surgery.

The business model behind this is straightforward: a private hospital is a facility that rents operating theatres, clinic rooms, beds, and nursing support to consultants whose primary employment is usually in an NHS trust. The hospital makes its revenue from a fee per episode of care, paid either by a private medical insurer or by the patient directly. The economics work because the episodes of care are defined in scope, planned in advance, and carried out by surgeons and anaesthetists whose training and competence sit within their NHS substantive roles.

What private hospitals typically do not have on site

The same economic design means that several categories of service which the NHS offers as a matter of course are not usually present in a UK private hospital.

• A walk-in Accident and Emergency department open to the public. Private hospitals generally do not provide public emergency access. If a member of the public walks in with chest pain or an injury, they will usually be redirected to the nearest NHS A&E.

• Large intensive care units. Most private hospitals have limited or no Level 3 intensive care capacity. Some large private groups operate intensive care units, but the majority of UK private hospitals rely on transfer to the NHS for critical care.

• Twenty-four-hour resident consultant cover. Overnight cover in many private hospitals is provided by a single resident medical officer (RMO), with consultants available on-call off site. NHS hospitals carry a far wider depth of overnight specialist cover.

• Paediatric and neonatal intensive care. Specialist children's intensive care is almost entirely an NHS service, concentrated in a defined number of tertiary centres.

• Major trauma. Major trauma networks are NHS-run. A patient arriving with major trauma anywhere in the UK is taken to a designated NHS major trauma centre.

• Complex cardiothoracic, neurosurgical, and tertiary specialist services with full intensive care backup, unless the private hospital is specifically configured for that work (a small number in London are).

• Comprehensive on-site emergency blood transfusion capacity at the scale needed for major haemorrhage protocols.

None of this is a criticism of private hospitals. It is the consequence of being set up for a defined scope of planned work. The scope is deliberate. It is what makes the private hospital efficient at what it does and what makes its costs predictable for insurers and self-pay patients.

The backstop: the NHS on 999

When a patient in a private hospital develops something that exceeds the hospital's operational scope, two things happen.

The clinical team on site stabilises the patient as far as possible, using the resources at the facility. A call is then made to the local NHS, usually via 999, and the patient is transferred to the nearest NHS acute hospital that can handle the presentation.

The transfer may be for one of several reasons:

• Unexpected post-operative deterioration that requires intensive care.

• Sepsis that requires multi-organ support.

• Major haemorrhage beyond the facility's protocol capacity.

• A new acute cardiac, neurological, or respiratory event.

• Any presentation in a child or pregnant woman that needs specialist tertiary input.

• Any diagnosis that cannot be managed inside the private facility's staffing and equipment scope.

The patient at that point becomes an NHS patient, treated free of charge, in an NHS facility. No private hospital in the UK is fully self-contained. Every one of them depends on the NHS being there, staffed, equipped, and willing to take the transfer.

The regulatory requirement: transfer arrangements by design

This dependency is formalised in regulation. The Care Quality Commission (CQC) inspection framework for independent acute hospitals requires each provider to demonstrate safe systems for deteriorating patients and formal arrangements for transfer to NHS services. Inspectors ask about escalation plans, named receiving NHS hospitals, transfer logistics, and outcomes.

Ninety-two per cent of independent acute hospitals are rated Good or Outstanding by the CQC, with the remainder rated Requires Improvement or Inadequate. Well-run private hospitals treat their transfer arrangements with the NHS as a core safety system and audit them regularly.

Historically, weaknesses in transfer arrangements have surfaced in individual cases and in regulatory reports, which is part of why the CQC framework has been progressively tightened. The overall picture is that most private patients are cared for safely, most of the time, and that the minority of cases where things do not go to plan depend on NHS acute services being available for transfer.

The scale: around 7,000 transfers a year

The Centre for Health and the Public Interest (CHPI) reports an order-of-magnitude figure of around 7,000 transfers per year from private facilities into NHS hospitals, driven mostly by a combination of unplanned complications, new acute presentations, and the limited intensive care capacity inside the private sector.

Measured against the total volume of private hospital activity in the UK, 7,000 transfers is a small fraction. The private sector delivers millions of episodes of care a year between outpatient, day-case, and inpatient work. Complication and transfer rates are low by any measure of elective healthcare activity, and the figures show that most patients who go private for an elective procedure receive the care as planned.

What the number does show is that the backstop is a structural feature of UK private healthcare, not an occasional exception. Several thousand times a year, a private patient's care migrates to the NHS because that is where the next level of complexity is designed to be handled.

Why this matters for patient choice

The practical implication, for a patient choosing between NHS and private care for a specific need, is a recognition that the two sectors sit in a sort of stepped relationship.

• For planned, straightforward, scoped work, private care is often a fast and pleasant route. An orthopaedic procedure that is clinically predictable, a routine endoscopy, a planned ENT operation, a diagnostic MRI scan, a consultant outpatient review: these are categories of work where the private sector is set up to do exactly what is needed, at a timing that the patient chooses, in a facility designed around that kind of activity.

• For anything that might escalate unexpectedly into genuine complexity, the NHS is, at some point, going to be the setting in which the complexity gets resolved. Whether the patient starts their care in the NHS or in the private sector, if something breaks out of the predictable path, the NHS will end up involved.

• For anything that already starts complex, the NHS is almost always the right first call. This includes critical illness, major trauma, most paediatric emergencies, most obstetric emergencies, tertiary-level cancer work, transplant, advanced cardiac care, and complex neurosurgery. The NHS is designed for these categories; the private sector generally is not.

Recognising this changes the question "private or NHS?" from a binary to a practical sequencing question. The answer usually depends on where, on a scale of predictable-to-complex, the specific piece of care sits.

For patients choosing between private providers, the Private Healthcare Information Network (PHIN), established as a remedy under the CMA Private Healthcare Market Investigation in 2014, publishes performance data for UK private hospitals and consultants at the procedure level. It is a useful public-facing starting point.

The summary

UK private hospitals are not self-contained. They are specialist facilities designed around planned, elective, predictable work, and they depend on the NHS to handle anything that exceeds that scope. The dependency is built into how the sector is regulated by the CQC, is the reason private hospitals are required to have named transfer arrangements with local NHS trusts, and is reflected in the roughly 7,000 patient transfers each year from private to NHS settings.

This is not a criticism of private hospital care. Well-run private hospitals deliver their defined scope safely, efficiently, and to a high standard, and their CQC ratings are on average good. It is a factual description of how the two sectors work together in the UK.

For a patient, the useful thing to take from this is that private care is a good fit for planned, scoped, predictable work and for faster access to it. For anything that is, or might turn out to be, genuinely complex or critical, the NHS is the system the country has built for exactly that job. Both matter. Each does something the other does not.

Sources and further reading

• Care Quality Commission, Independent healthcare services: information for providers. CQC inspection framework for independent acute hospitals.

• Care Quality Commission, How we work with national partners: independent healthcare services. CQC ratings across the independent acute sector.

• Care Quality Commission, Inspection framework: Critical Care. Common critical care inspection framework covering NHS and independent providers.

• Centre for Health and the Public Interest, Risks to the NHS when referring to private hospitals. Analysis including the 7,000-patient transfer figure.

• NHS England, Commissioning critical care services. How critical care is commissioned and networked across the NHS.

• HCA Healthcare UK, Intensive Care Medicine. An example of private-sector ICU provision in the UK.

• gov.uk, Private Healthcare Market Investigation. CMA 2014 investigation and subsequent remedies.

• Private Healthcare Information Network (PHIN), phin.org.uk. Official UK private healthcare performance data.

• British Medical Association, The CMA and private practice. BMA guidance on the CMA private-healthcare order.

• Intensive Care National Audit and Research Centre (ICNARC), icnarc.org. National audit of intensive care activity and outcomes.

About the author

Dr Seth Rankin qualified in medicine at Auckland School of Medicine in New Zealand in 1990 and worked as a junior doctor across New Zealand, Australia, and the UK before qualifying as a Member of the Royal College of General Practitioners (MRCGP) through the London Deanery in 2004. He was Managing Partner of Wandsworth Medical Centre from 2006 to 2016 and served as a Board Member of Wandsworth Clinical Commissioning Group for nine years. He is the founder of London Travel Clinic, London Doctors Clinic, London Medical Laboratory, and LoveMyLife.

Read more about Dr Seth Rankin.

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