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    What is an NHS referral?

    Understanding how GP referrals work, what happens after a referral, and how patients move through the NHS system.

    6 minute readUpdated March 2026

    At a glance

    RTT TARGET
    18 weeks
    From referral to treatment
    WHO REFERS
    Usually your GP
    Other clinicians can too
    YOUR CHOICE
    Where you go
    Patient choice applies in many cases

    An NHS referral happens when a healthcare professional, usually a GP, sends a patient to another healthcare service for further assessment, diagnosis, or treatment. In many cases within the NHS, a referral is required before a patient can see a specialist doctor or consultant.

    What is an NHS referral?

    An NHS referral is when a healthcare professional directs a patient to another service for specialist care.

    Most referrals are made by GPs, although other healthcare professionals may also refer patients in certain situations.

    Examples of services patients may be referred to include:

    • hospital consultants
    • diagnostic services such as scans or blood tests
    • physiotherapy services
    • mental health services
    • autism or ADHD assessment pathways

    Source: NHS patient referral guidance.

    Why GPs make referrals

    GPs are responsible for providing primary care and assessing a wide range of health concerns.

    If a GP believes further investigation or specialist expertise is required, they may refer the patient to another NHS service.

    Common reasons for referral include:

    • symptoms requiring specialist investigation
    • diagnostic tests that cannot be done at the GP practice
    • specialist treatment or surgery
    • mental health assessments

    What happens after a GP referral?

    After a referral is made, the receiving service will review the information sent by the GP.

    The service may then:

    • accept the referral and place the patient on a waiting list
    • request additional information from the GP
    • redirect the referral to a more appropriate service
    Key point
    If the referral is accepted, the patient will usually receive an appointment letter or message confirming the next step.

    Referral to Treatment (RTT) explained

    Many NHS referrals fall under the Referral to Treatment (RTT) pathway.

    In England, the NHS aims for patients to start treatment within 18 weeks of referral for many services. However, waiting times can vary depending on the specialty and region.

    Referral to Treatment Pathway

    Visit GP
    GP referral made
    Referral reviewed by specialist service
    Appointment scheduled
    Treatment begins

    Source: NHS England RTT guidance.

    How long do NHS referrals take?

    Referral waiting times vary widely across the NHS.

    Factors that influence waiting times include:

    • the type of specialist service
    • demand for the service
    • local healthcare capacity
    • the urgency of the referral

    Some referrals may lead to appointments within weeks, while others may take longer depending on waiting lists.

    Can you choose where you are referred?

    In many situations, patients in England have the right to choose which hospital or specialist service they are referred to.

    This is known as patient choice within the NHS.

    The choice may depend on:

    • the type of treatment needed
    • available providers
    • local commissioning arrangements

    What if your referral is delayed?

    If you have been referred to a specialist service and are waiting for an appointment, you may wish to:

    • contact the hospital or clinic to confirm the referral
    • speak with your GP practice
    • check waiting time information for the service

    Waiting lists vary across specialties and regions.

    Referrals are a key part of how patients move through the NHS system.

    Understanding how referrals work can help patients navigate the healthcare system more confidently.

    Find Care Compare provides guides and tools to help patients understand healthcare pathways and explore available care providers.

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    Frequently asked questions

    Sources

    This article summarises publicly available information from:

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    Disclaimer: This guide is for informational purposes only. It does not constitute medical or legal advice. Always consult your GP or a qualified professional for advice specific to your circumstances.