Referral and Shared Care

Introduction

Referral is the process of seeking specialist opinion, investigation, or treatment that goes beyond what can be safely and appropriately delivered in primary care. It is one of the most frequent actions a GP takes and, done poorly, is a well-documented source of delay, wasted specialist capacity, and patient harm - a badly written referral can sit in a triage queue being misclassified while a serious diagnosis waits.

This topic is examined both as a communication skill (writing a referral that gets triaged and acted on correctly) and as a systems knowledge topic (knowing which pathway - routine, urgent, two-week-wait, advice and guidance - fits a given clinical scenario).

It also intersects with patient choice: in the NHS, patients referred for a first outpatient appointment generally have a legal right to choose which provider they are referred to, and the referring clinician's role is to make an appropriate, well-written referral to the service the patient chooses, rather than always defaulting to the nearest or historically used provider.

Deciding whether to refer

The decision to refer should be an active clinical judgement, not a default response to diagnostic difficulty or patient pressure - over-referral wastes scarce specialist capacity and can delay care for patients with a more pressing need, while under-referral risks missing a diagnosis or treatment that genuinely needs specialist input.

• Diagnostic uncertainty beyond what primary care investigation can resolve
• A condition meeting defined specialist referral criteria (e.g. suspected cancer, red-flag symptoms)
• Treatment requiring specialist equipment, expertise or monitoring (e.g. surgery, specialist drug initiation)
• Failure to respond to appropriate primary care management within a reasonable timeframe
• Patient choice or a second opinion request, where reasonable
• A statutory or safeguarding requirement (e.g. certain safeguarding referrals)

UK referral pathways

The two-week-wait pathway

NICE NG12 defines specific symptom and risk-factor combinations that meet the threshold for a two-week-wait referral, reflecting a defined positive predictive value for cancer (generally around 3% or higher) at which urgent specialist assessment is justified.¹ Familiar examples include rectal bleeding with a change in bowel habit in an older adult, an unexplained breast lump, and post-menopausal bleeding - but the criteria are specific and vary by cancer type, and a referral that does not clearly state which criterion is met risks being downgraded in triage.

Writing an effective referral

A referral is a clinical handover document, and should be written with the same discipline as any other. Poor referrals are a recognised cause of inappropriate triage, delayed care, and unnecessary further correspondence to clarify basic information.

1. State the clinical question explicitly - what specifically are you asking the specialist to do (diagnose, treat, advise, take over management)?
2. Give the relevant history concisely - onset, duration, associated symptoms, red flags present or explicitly absent, and relevant past medical history
3. Include examination findings relevant to the referral, not a generic full systems review
4. List current medication and allergies
5. State what has already been tried - investigations done and their results, treatments attempted and their effect - so the specialist is not duplicating primary care work
6. Specify urgency and the reasoning behind it, using the correct pathway
7. Include how to reach you if the specialist needs to clarify anything before the appointment

Advice and guidance

Advice and guidance (A&G) is a lower-intensity alternative to a formal referral, where a GP submits a clinical query to a specialist team electronically and receives management advice, sometimes avoiding the need for the patient to be seen in person at all. It is increasingly used across UK secondary care as a way to manage demand and keep more appropriate care within primary care where safe to do so.²

A&G is appropriate where the question is genuinely about management guidance rather than needing hands-on specialist assessment - for example, confirming whether a particular drug combination is safe to initiate, or whether a mildly abnormal result needs formal referral at all. It is not a substitute for referral where the patient needs to be physically examined, investigated with specialist equipment, or seen urgently.

Shared care arrangements

Shared care is a formal, explicit agreement dividing ongoing responsibility for monitoring and prescribing between a specialist and the GP, typically used for drugs that require specialist initiation but where ongoing prescribing and routine monitoring can safely be delegated to primary care once the patient is stable - for example, some disease-modifying antirheumatic drugs, certain psychiatric medications, and some hormone therapies.³

• A shared care agreement should specify: what monitoring is required and how often, who is responsible for arranging and reviewing it, the parameters that require action, and what to do (including who to contact) if a result is abnormal
• A GP is not obliged to accept a shared care request if it is unclear, if the required monitoring is beyond what primary care can reasonably deliver, or if the drug carries risks the GP does not feel competent to manage without clearer specialist backup
• Responsibility remains genuinely shared, not transferred wholesale - the specialist retains responsibility for aspects of care requiring their expertise, and the arrangement should be reviewed periodically, not assumed to be indefinite by default

Worked example: a shared care drug

Methotrexate for rheumatoid arthritis is a commonly used illustration of how a shared care agreement should work in practice, and the same structure applies to most other shared care drugs.

The value of setting this out explicitly, rather than leaving it implicit, is that everyone - GP, specialist and patient - knows exactly what happens if a result comes back abnormal, rather than that decision being made ad hoc under time pressure by whichever clinician happens to see the result first.

When a referral is rejected or downgraded

Referrals are sometimes returned, rejected, or downgraded to a lower-urgency pathway by the receiving service - often because the referral did not clearly demonstrate that referral criteria were met, or because further primary care assessment or investigation was expected first.

• Read the rejection reason carefully rather than simply re-submitting the same letter
• If clinical urgency genuinely warrants the original pathway, provide the missing information or escalate through a direct conversation with the specialist team rather than accepting a downgrade that does not fit the clinical picture
• Document the outcome and the reasoning, including any conversation with the specialist team, in the patient record
• Keep the patient informed if the pathway or expected timeframe changes, rather than leaving them unaware that anything has altered

Common pitfalls

• Vague referrals with no explicit clinical question, risking inappropriate triage
• Wrong pathway chosen - using routine referral for symptoms that meet two-week-wait criteria, or vice versa for symptoms that do not
• Missing safety-netting - assuming the referral itself is sufficient action, without advising the patient what to do if symptoms worsen while waiting
• Failing to chase overdue urgent referrals where the expected timeframe has passed
• Accepting shared care responsibility without clarity on monitoring and escalation

Safety-netting while the patient waits

With waiting times for routine outpatient appointments now frequently measured in months, the interval between referral and being seen is itself a period of clinical risk that the referring clinician retains responsibility for managing.

• Tell the patient the realistic expected timeframe, so a long wait does not lead them to assume the referral has been lost or that their problem was not taken seriously
• Give specific symptoms that should prompt them to seek earlier review, rather than a vague instruction to come back if worse
• State clearly who to contact and how, including out of hours, if those symptoms occur
• Arrange interim review yourself where the condition may deteriorate meaningfully during the expected wait
• Continue and review any interim treatment, rather than leaving the patient untreated on the assumption the specialist will start something
• Have a system for identifying referrals that have not been acknowledged within the expected time, particularly on urgent and two-week-wait pathways

Red flags

Summary

Effective referral and shared care depend on choosing the right pathway for the clinical urgency, writing a referral that states its question clearly enough to be triaged correctly, and treating shared care as a genuine, clearly defined division of responsibility rather than a transfer of risk to whichever clinician happens to see the patient next.

Both skills ultimately serve the same underlying purpose: making sure a patient's care is coordinated across the interface between primary and secondary care, rather than fragmented into a series of separate contacts where each clinician assumes someone else has taken responsibility for the parts they have not personally seen.