How to Get Your NHS Number

What an NHS number is

An NHS number is a unique 10-digit identifier used to link a patient's medical records across different NHS organisations in England and Wales. It appears on hospital letters, prescriptions, GP records, and most NHS communications. Knowing the number is not essential for receiving care, because NHS staff can look it up from name, date of birth, and address, but quoting it speeds up administration and reduces the risk of mismatched records.

The number itself has no meaning beyond identification. It is not a code that encodes birth date, location, or any other personal data. Each number is checked by a final check digit so that typos can be caught at entry.

How an NHS number is issued

In England and Wales, an NHS number is generated by the NHS Personal Demographics Service when a patient first registers with a GP, is born in an NHS setting, or first accesses an NHS service that records them on the national spine. For UK-born babies, the number is generated shortly after birth registration. For people moving to the UK as adults, the trigger is typically GP registration, and the number is allocated within a few working days.

A patient does not need to apply separately for an NHS number. Asking the GP practice to confirm the number once registration is complete is enough. The number is then printed on the first letter or text from the practice and is visible in the NHS App once the patient has linked their account.

Finding a forgotten NHS number

An NHS number can be found in several places. The most common are the NHS App, the patient's online GP record, a recent prescription, a hospital appointment letter, or a referral letter. If none of those are to hand, the GP practice can confirm the number over the phone after identifying the patient.

The NHS in England also offers an online "find your NHS number" service through the gov.uk and NHS websites. The service asks for name, date of birth, postcode, and contact details, verifies identity, and returns the number or sends it by post or email. The service is available without charge.

NHS numbers across the four nations

The NHS is not a single organisation. Each nation in the UK runs its own service with its own identifier:

• England and Wales use the 10-digit NHS number through the NHS Spine and Personal Demographics Service.
• Scotland uses the Community Health Index, or CHI number, a 10-character identifier based on the patient's date of birth plus a sex digit and a check digit. The CHI is issued through GP registration in Scotland.
• Northern Ireland uses a Health and Care number, often shortened to H+C number, issued by the Business Services Organisation when a person first contacts HSC services.

Moving between nations does not delete the previous identifier. A person who lived in Scotland and now lives in England will have both a CHI number on Scottish records and an NHS number on English records. The records themselves are not automatically merged, although hospitals and GP practices can request a copy of notes from another nation.

What an NHS number is used for

The NHS number is used to link records across primary care, secondary care, community services, mental health services, and pharmacy. When a GP refers a patient to a hospital, the NHS number on the referral lets the hospital pull together previous records and avoids duplicates. Electronic prescriptions use the NHS number to route a script to the patient's nominated pharmacy. Maternity, screening invitations, and immunisation programmes also rely on the number for invitation lists.

The number is also used for some statistical and research purposes through pseudonymised data sets governed by NHS information governance rules. The Information Commissioner's Office regulates how personal data, including NHS numbers, is processed under the UK GDPR and the Data Protection Act 2018.

What an NHS number is not

The NHS number is not a national identity number. It does not establish entitlement to free care; overseas visitor charging rules apply separately, based on residence and immigration status. Holding an NHS number does not exempt a person from the Immigration Health Surcharge. Conversely, lacking an NHS number does not bar a person from urgent NHS care, which is provided regardless and billed later where charges apply.

The NHS number is also not the same as the medical record number used internally by a particular hospital. A hospital may issue its own local identifier alongside the NHS number, but the NHS number is the only national one.

Keeping the number safe

An NHS number is personal data and should be treated with the same care as a date of birth or address. NHS staff will sometimes ask for it during a call to confirm identity. Sharing it casually with third parties is not advisable, particularly with anyone claiming to be from the NHS by unsolicited phone or email. The Information Commissioner's Office publishes guidance on phishing and identity scams that target health identifiers.

Children and NHS numbers

A child born in the UK is issued an NHS number shortly after birth, recorded on the personal child health record (red book) and on subsequent immunisation and screening invitations. A child arriving from overseas receives an NHS number on first GP registration, like an adult. Parents asking the GP practice for the child's number after registration is the simplest way to obtain it without delay.

Linking the NHS App to the number

In England, linking the NHS App provides a quick way to confirm and store the NHS number on a mobile device. The link requires identity verification, typically by passport or driving licence photo plus a video selfie, or by an in-practice verification step at the GP surgery. Once linked, the App displays the number on the profile page and gives access to test results, repeat prescription ordering, and digital messages from the GP and from hospitals. The same record sits behind the patient's online GP services account, so a change of practice does not break the link. Information governance for the App is published by NHS England and is regulated by the Information Commissioner's Office under UK GDPR.

Common errors and how to avoid them

Three errors come up regularly. The first is transcribing the number with the wrong digit grouping, which can confuse some online forms; the official format is three digits, three digits, four digits with single spaces between the groups. The second is treating a hospital local identifier as the NHS number. Hospital letters often display both, but only the 10-digit national number is the NHS number, and quoting a local hospital number to a different trust will not retrieve records. The third is opening a duplicate record by registering with a new GP and giving slightly different name spellings or date of birth from previous registrations. Where a duplicate is suspected, the practice can request a merge through NHS England's data quality team, which avoids future record fragmentation.

Disclaimer

This article is general information about UK rules and processes at the time of writing. It is not legal, immigration, tax, or financial advice. Rules and figures change. Verify the current position with the relevant authority (gov.uk, HMRC, FCA, or a regulated adviser) before acting on anything here.

Frequently asked questions

Do new arrivals need to apply for an NHS number?

No. An NHS number is issued automatically on first GP registration in England or Wales, or on first contact with an NHS service that records the patient on the national spine. There is no separate application form.

How long does it take to receive an NHS number after GP registration?

The number is usually allocated within a few working days of registration. The GP practice can confirm the number once it has been issued.

What if a person has lived in both Scotland and England?

They will have a CHI number in Scotland and an NHS number in England. Each nation's records are separate, although copies of notes can be requested between them on clinical request.

Is an NHS number proof of free NHS treatment?

No. Entitlement to free secondary care is based on lawful residence and immigration status under the NHS overseas visitor charging regulations, not on holding an NHS number.

Can an NHS number be looked up online?

Yes. The find your NHS number service available through gov.uk and the NHS verifies the patient and either displays the number, posts it, or emails it. The service is free.

Is the NHS number the same on every NHS letter?

Yes. The same 10-digit number follows the patient across GP, hospital, and pharmacy in England and Wales. Local hospital identifiers are separate.