When your NHS Trust needs more clinical capacity, the solution may not be as simple as adding more staff. You’ll also need to decide where extra care will be delivered, how it will work with existing patient pathways and how much of the service you want to manage directly.
Both clinical insourcing and outsourcing can help increase capacity, but they work in different ways. Insourcing brings an external clinical service into the Trust, while clinical outsourcing moves more of the service to an external provider.
In this guide, we’ll compare clinical insourcing vs outsourcing, explain when each model may be useful and look at the key questions to consider before choosing an approach.
What is clinical insourcing in the NHS?
Clinical insourcing is when an external provider delivers a defined clinical service on NHS premises, using the Trust’s existing facilities, equipment and infrastructure.
A Trust may have theatres or clinics available during evenings or weekends but not enough clinicians to run additional lists. An insourcing provider can bring in the clinical team needed to use that available space and treat more patients.
What is clinical outsourcing in the NHS?
Clinical outsourcing is when a Trust contracts a defined service or activity to an external provider.
Patients may be treated at an independent hospital, specialist centre or another external location. The provider will usually supply its own facilities, workforce, equipment and processes.
Outsourcing can therefore be useful when the Trust does not have enough space or specialist facilities to deliver more activity itself.
What are the main differences between clinical insourcing and outsourcing?
|
|
Clinical insourcing | Clinical outsourcing |
| Location of care | NHS premises | May be delivered in an external setting |
| Facilities | Uses existing Trust facilities and equipment | Uses provider facilities and equipment |
| Patient pathway | Often stays within existing Trust pathways | May move into a separate provider pathway |
| Day-to-day oversight | Usually closer to Trust teams | More delivery managed externally |
| Workforce | External team works on site | Provider delivers through its own model |
| Patient travel | Usually remains at the Trust site | May require travel elsewhere |
| Capacity constraint it can address | Often workforce | Often space, equipment or specialist facilities |
Where care is delivered
Location is the clearest difference. With insourcing, patients are treated on NHS premises. With outsourcing, care is delivered by an external provider and may require patients to travel to another setting.
Control over patient pathways and services
Keeping activity within the Trust can make it easier to connect additional sessions with existing patient pathways and local processes.
With outsourcing, patients may move between NHS and external services. The Trust and provider therefore need clear arrangements for referrals, records, results, follow-up and any return to Trust care.
Clinical governance and accountability
Both models need clear clinical governance and accountability. For insourcing, the provider should have appropriate clinical oversight and governance in place, with responsibilities between the Trust and provider clearly agreed before activity begins.
Workforce and service delivery
Insourcing adds a defined clinical service to existing NHS capacity, allowing the provider to bring the team and oversight needed to deliver activity within the Trust.
With outsourcing, responsibility for delivering the agreed activity sits with the external provider. While this can relieve pressure on internal teams, it means more of the day-to-day service is managed outside the Trust.
Use of facilities and infrastructure
This is often where the right model becomes easier to identify. If a Trust has available theatres, clinics or diagnostic equipment but not enough clinicians to run additional sessions, insourcing can help put that existing capacity to use.
If the Trust does not have the space, equipment or specialist facilities required, outsourcing may be the more practical option.
When might an NHS Trust consider clinical insourcing?
Insourcing is most useful when the Trust has the facilities to treat more patients but does not currently have enough clinical capacity to use them fully.
This may include situations where:
- Existing facilities are available, but workforce capacity is constrained
- Waiting lists need additional short- or medium-term support
- Evening or weekend activity could increase throughput
- The Trust wants patients to remain within existing pathways
- There is a desire to reduce reliance on ad hoc locum staffing
- A department needs additional support while developing a longer-term internal model
Supporting waiting-list recovery
Clinical insourcing can provide targeted additional capacity for services facing waiting-list pressure. That might mean extra outpatient clinics, theatre lists, diagnostic sessions or activity within a particular specialty.
Making better use of existing NHS facilities
Where space and equipment already exist, clinical insourcing can extend delivery into evenings, weekends or other available sessions. This can help Trusts treat more patients using infrastructure they already have, rather than sending activity elsewhere.
Creating additional capacity without permanent expansion
Not every capacity problem requires a permanent solution. A department may need extra support while recruitment catches up, a backlog is reduced or longer-term service changes are developed.
Insourcing can provide defined short or medium-term capacity during that period without requiring the Trust to permanently expand a service.
When might outsourcing be the better option?
Outsourcing may make more sense when the Trust cannot create the additional capacity it needs on its own site.
That could be because theatres are already fully used, specialist equipment is unavailable or the required service needs facilities the Trust does not have. An external provider may already have the space, infrastructure and workforce needed to deliver that activity.
What should NHS decision-makers consider when choosing between insourcing and outsourcing?
A useful starting point is a simple question: what is currently stopping the service from treating more patients? The answer will often point towards the most suitable model.
Current capacity and infrastructure
Start with what the Trust already has. Are theatres, clinics or diagnostic rooms available but underused because there are not enough clinicians to run them? If so, insourcing may help. If the Trust does not have the physical space, equipment or specialist facilities required, outsourcing may be more realistic.
Patient pathway and continuity
Follow the patient journey through both options, asking questions such as:
- Where will the patient be seen?
- Who manages their records and results?
- What happens if they need further investigation, follow-up or escalation?
The chosen model should make those steps clear and avoid creating unnecessary gaps between services.
Clinical governance and quality assurance
Trusts should be clear about clinical leadership, incident management, safeguarding, audit, complaints, reporting and how quality will be monitored. The provider should have the experience and oversight needed to deliver the agreed service safely, with responsibilities clearly documented before activity starts.
Cost and commercial considerations
Headline price only tells part of the story. Trusts should consider total service cost, staffing and infrastructure requirements, contract structure, value for money and whether the model remains sustainable for the period it is needed.
Mobilisation and timescales
The quickest model on paper is not necessarily the quickest to deliver safely. Timescales should account for compliance, estates, equipment, patient booking, IT access, reporting and clinical governance. A realistic mobilisation plan should identify these dependencies early rather than discovering them as the first sessions approach.
Long-term sustainability and exit planning
Additional capacity should solve an immediate problem without losing sight of what happens next. Consider what the service should look like when the external support ends. Does the model help the department move towards sustainable internal delivery, or does it create a dependency that will be difficult to unwind?
Why a tailored approach matters
There is no single model that will work for every Trust, department or specialty. One service may have available theatres but not enough clinicians. Another may have the workforce but no physical capacity. A third may only need temporary support while recruitment or service redesign is underway.
The right approach should start with the problem the Trust needs to solve, then take account of workforce, facilities, patient pathways, governance requirements and longer-term plans.
How Athona Clinical Solutions supports NHS Trusts
At Athona, we work with NHS Trusts to design tailored insourcing projects around specific service needs.
Rather than starting with a fixed model, we build clinical teams around your requirements, helping to increase activity using existing facilities and patient pathways.
We consider the practical details of delivery on every project, including mobilisation, governance, reporting, operational efficiency and a clear exit strategy.
With experience across healthcare and places on major NHS frameworks, we can support Trusts that need additional clinical capacity while keeping the service aligned with their wider plans.
Clinical insourcing vs outsourcing: which is right for your Trust?
The most useful question is not whether insourcing or outsourcing is better. It is which model solves the problem your service actually has.
If you have the space, equipment and pathways but not enough clinical capacity to use them fully, insourcing may be the stronger option.
If the main constraint is space, specialist equipment or facilities, outsourcing may be more practical.
Whichever route you choose, it should work for your patients, give you the right level of oversight and support the longer-term direction of the service, not simply add activity in the short term.
Speak to our team and find a tailored solution for your Trust.
FAQs
What is the main difference between insourcing and outsourcing in the NHS?
Insourcing delivers an external clinical service on NHS premises while outsourcing moves the service to an external provider, usually at another site.
Is clinical insourcing the same as using locum staff?
No. Insourcing delivers a defined clinical service with its own team, oversight and governance, while locum staff usually fill individual staffing gaps.
Can clinical insourcing help reduce NHS waiting lists?
Yes. Insourcing can add extra clinical capacity, including evening and weekend sessions, as part of a wider waiting-list recovery plan.
Does clinical insourcing take place on NHS premises?
Yes. Clinical insourcing is delivered within NHS premises, using the Trust’s existing facilities and infrastructure where appropriate.
How does an NHS Trust choose between insourcing and outsourcing?
Start with what is limiting capacity. If facilities exist but more clinical capacity is needed, insourcing may be right for your Trust. If space, equipment or specialist facilities are limited, outsourcing may be more appropriate.
