Can I order an HbA1c for myself? The short answer is yes — in the UK, you can arrange this blood test privately without a GP referral. The HbA1c test measures your average blood glucose over the preceding 8–12 weeks and is central to diagnosing Type 2 diabetes and identifying those at high risk. Whether you are concerned about your blood sugar, want to monitor between NHS appointments, or simply prefer the convenience of private testing, this guide explains your options, how to interpret your results using NHS reference ranges, and when to seek clinical follow-up.

What Is an HbA1c Test and What Does It Measure?

The HbA1c test measures the proportion of glycated haemoglobin in red blood cells, reflecting average blood glucose over approximately 8–12 weeks. It is the primary test for diagnosing Type 2 diabetes and identifying non-diabetic hyperglycaemia in most adults.

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The HbA1c test — formally known as the glycated haemoglobin test — is a blood test that measures the average level of blood glucose (sugar) over approximately the preceding 8–12 weeks. It works by detecting the proportion of haemoglobin (the protein in red blood cells that carries oxygen) that has glucose attached to it. Because red blood cells have a lifespan of roughly 120 days (around 10–12 weeks on average), the test provides a reliable picture of longer-term blood sugar control rather than a single moment in time. It is worth noting that HbA1c is weighted towards the most recent 4–6 weeks, so recent changes in blood glucose have a greater influence on the result than earlier fluctuations.

HbA1c is expressed either as a percentage or in millimoles per mole (mmol/mol), with the latter being the standard unit used across NHS laboratories in the UK. The test is central to the diagnosis and ongoing management of Type 2 diabetes in most adults, and is also used to identify a state of high risk of Type 2 diabetes (non-diabetic hyperglycaemia, sometimes referred to as prediabetes) — where blood glucose is elevated but not yet at diabetic levels.

Importantly, HbA1c is not recommended for diagnosing Type 1 diabetes, which is usually diagnosed on clinical grounds alongside plasma glucose and/or ketone measurements. HbA1c should also not be used for diagnosis in the following situations, where results may be unreliable or inappropriate:

• Pregnancy (including suspected gestational diabetes — specific oral glucose tolerance testing is used instead)

• Children and young people

• Suspected Type 1 diabetes or rapid onset of symptoms (plasma glucose testing is required)

• Acute illness or acute hyperglycaemia

• Within approximately 2 months of symptom onset

• Haemoglobin variants and haemoglobinopathies (e.g., sickle cell trait, HbS, HbC)

• Haemolytic anaemia or other haemolytic states

• Recent blood transfusion or significant blood loss

• Advanced chronic kidney disease (CKD)

• Iron deficiency anaemia

Unlike a fasting glucose test, the HbA1c does not require you to fast beforehand, making it more convenient for routine testing. If any of the conditions listed above apply to you, a healthcare professional may recommend an alternative method of glucose assessment, such as fasting plasma glucose or an oral glucose tolerance test.

Can You Order an HbA1c Test Without a GP Referral in the UK?

Yes — UK adults can order an HbA1c test privately without a GP referral through direct-access testing services. No legal or regulatory requirement prevents self-requested testing, though results should be interpreted alongside your full medical history.

Yes — in the UK, it is entirely possible to order an HbA1c test for yourself without a GP referral. While the NHS provides HbA1c testing through GP surgeries and diabetes clinics when clinically indicated or via risk-based assessment pathways, there is no legal or regulatory requirement preventing individuals from accessing this test privately. A growing number of accredited private laboratories and online health services now offer self-requested blood testing directly to the public.

This is sometimes referred to as direct-access testing or self-pay testing. It is particularly relevant for individuals who:

• Are concerned about their risk of diabetes but have not yet been referred for NHS testing

• Want to monitor their blood sugar between scheduled NHS appointments

• Prefer the convenience and speed of private testing

• Do not currently meet the NHS criteria for testing when clinically indicated or via risk-based assessment (such as the NHS Health Check)

It is important to understand the regulatory distinction between the two main types of private HbA1c test available. Most services offered online or by post are self-sampling tests — you collect a blood sample at home, which is then sent to an accredited laboratory for analysis. These differ from self-testing devices (point-of-care meters), which analyse the sample directly and, if sold to the public in the UK, must carry UKCA marking and meet MHRA requirements for in vitro diagnostic (IVD) medical devices.

Ordering a test for yourself does not replace clinical assessment. A result — whether normal, borderline, or elevated — should ideally be interpreted in the context of your full medical history, symptoms, and other risk factors. If you receive an unexpected or concerning result, you should always follow up with a qualified healthcare professional.

If you are under 18 or pregnant, you should not rely on a private HbA1c test for diagnostic purposes and should seek a clinical assessment through your GP or maternity team instead.

Private and At-Home HbA1c Testing Options Available in the UK

There are several routes through which you can arrange an HbA1c test independently in the UK, ranging from at-home finger-prick kits to walk-in private clinics.

At-home finger-prick (dried blood spot) tests are among the most accessible options. These kits are posted to your home; you collect a small blood sample via a finger-prick lancet, apply it to a collection card, and return it to an accredited laboratory by post. Results are typically delivered online within a few days. It is important to check that the provider uses a sample type (dried blood spot or capillary blood) that has been validated for postal transport and laboratory analysis.

Private phlebotomy services and walk-in clinics offer venous blood draws, which are the recommended sample type for confirming a diagnosis of diabetes. Availability and appointment requirements vary by provider and location — it is advisable to check with your chosen service before attending.

Online health platforms allow you to order a test kit online, with results often reviewed by a clinician before being released to you — adding an additional layer of safety. A number of such services are available in the UK; this article does not endorse any specific provider.

For diagnostic confirmation of diabetes, a venous laboratory HbA1c — analysed by an IFCC-aligned, UKAS-accredited (ISO 15189) laboratory — is recommended. Finger-prick or point-of-care results may be used for monitoring but should not be relied upon as the sole basis for a new diagnosis.

When choosing a provider, look for the following quality indicators:

• UKAS accreditation (ISO 15189) for the processing laboratory — you can verify this via the UKAS 'Find an accredited organisation' search tool

• IFCC traceability for HbA1c measurement

• Participation in external quality assurance (EQA), such as UK NEQAS for HbA1c

• Clinician review of results before release

• Clear guidance on what to do if results are abnormal

• Transparent pricing with no hidden fees

Costs for private HbA1c testing in the UK typically range from approximately £25 to £60, depending on the provider and whether the test is part of a broader health panel.

Understanding Your HbA1c Results Using NHS Reference Ranges

NHS ranges classify HbA1c below 42 mmol/mol as normal, 42–47 mmol/mol as high risk of Type 2 diabetes, and 48 mmol/mol or above as indicative of diabetes. In the absence of symptoms, a diagnosis requires confirmation with a repeat test on a separate day.

Once you receive your HbA1c result, it is helpful to interpret it against the reference ranges used by the NHS and aligned with guidance from the National Institute for Health and Care Excellence (NICE) and the World Health Organization (WHO).

The standard NHS HbA1c reference ranges are as follows:

• Below 42 mmol/mol (6.0%) — Normal range; no indication of diabetes or high risk of Type 2 diabetes

• 42–47 mmol/mol (6.0–6.4%) — High risk of Type 2 diabetes (non-diabetic hyperglycaemia, sometimes referred to as prediabetes); indicates an elevated risk of developing Type 2 diabetes

• 48 mmol/mol (6.5%) or above — Indicative of diabetes

A single result does not automatically confirm or exclude a diagnosis. In the absence of symptoms, a diagnosis of diabetes requires confirmation with a repeat HbA1c test on a separate day — ideally using a venous blood sample analysed by a UKAS-accredited (ISO 15189) laboratory. Where HbA1c is unreliable (see the first section for the full list of situations), fasting plasma glucose or an oral glucose tolerance test should be used instead. If you have symptoms of diabetes or are acutely unwell, plasma glucose-based testing is preferred and you should seek prompt clinical assessment rather than relying on HbA1c.

Important diagnostic caveats: These reference ranges apply to most adults being assessed for Type 2 diabetes. They should not be used to diagnose diabetes in pregnancy, in children and young people, in suspected Type 1 diabetes, or in any of the other situations listed in the first section of this article.

If your result falls in the high-risk range (42–47 mmol/mol), this is not a cause for alarm but is a meaningful signal. Lifestyle modifications — including dietary changes, increased physical activity, and weight management — have been shown to significantly reduce the risk of progression to Type 2 diabetes. NICE guidance recommends that people in this range are typically rechecked annually. The Healthier You: NHS Diabetes Prevention Programme (NHS DPP) offers structured, evidence-based support for individuals identified as being at high risk, and you may be eligible for referral.

When to Share Your Results With a GP or Healthcare Professional

Contact your GP if your HbA1c is 48 mmol/mol or above, falls in the high-risk range with additional risk factors, or is unexpected alongside symptoms. Seek urgent care immediately if symptoms suggest Type 1 diabetes or diabetic ketoacidosis.

Regardless of how you obtained your HbA1c result, there are clear circumstances in which you should share it with a GP or another qualified healthcare professional promptly.

You should contact your GP if your result shows:

• An HbA1c of 48 mmol/mol or above, which may indicate diabetes and requires clinical confirmation and further assessment

• A result in the high-risk range (42–47 mmol/mol), particularly if you have additional risk factors such as obesity, a family history of Type 2 diabetes, cardiovascular disease, or polycystic ovary syndrome (PCOS)

• Any result that is unexpected or inconsistent with how you feel, especially if you are experiencing symptoms such as increased thirst, frequent urination, unexplained weight loss, or fatigue

Seek same-day urgent care (via NHS 111 or an urgent GP appointment) or call 999 if you or someone else has symptoms that may suggest Type 1 diabetes or diabetic ketoacidosis (DKA), including abdominal pain, vomiting, rapid or deep breathing, dehydration, confusion, or a fruity smell on the breath. Do not wait for an HbA1c result in this situation — plasma glucose and ketone testing are required urgently.

Children, young people, and pregnant individuals with elevated readings or symptoms of diabetes should be assessed urgently by a healthcare professional and should not rely on HbA1c alone for diagnosis.

Even if your result appears normal, it is worth discussing it with a healthcare professional if you have ongoing concerns about your metabolic health or if you are taking medicines known to affect blood glucose levels — such as corticosteroids, antipsychotics, or certain antihypertensives. If you suspect that a medicine is causing a change in your blood glucose, you can report this to the MHRA Yellow Card scheme (available at yellowcard.mhra.gov.uk), which collects information on suspected side effects of medicines and medical devices in the UK.

Private test providers are not integrated with NHS systems, meaning your GP will not automatically receive your results. It is therefore your responsibility to share relevant findings. Bringing a printed or digital copy of your result to your appointment will help your GP contextualise the finding within your broader health picture. Timely sharing of results ensures that any necessary follow-up — including repeat testing, referral to a diabetes specialist, or enrolment in a prevention programme — can be arranged without delay.

NHS HbA1c Testing: Who Qualifies and How to Request One

NHS HbA1c testing is available free of charge to those with diabetes symptoms, existing diabetes requiring monitoring, or high-risk conditions identified through the NHS Health Check. Speak to your GP or practice nurse to request a test if you meet the clinical criteria.

The NHS provides HbA1c testing free of charge at the point of care for individuals who meet specific clinical criteria. Understanding who qualifies can help you determine whether to pursue NHS testing or consider a private alternative.

You are likely to be offered an NHS HbA1c test if you:

• Have symptoms suggestive of diabetes (e.g., polydipsia, polyuria, unexplained weight loss, or fatigue)

• Have been identified as being at high risk of Type 2 diabetes through the NHS Health Check programme (offered to adults aged 40–74 in England)

• Are already diagnosed with diabetes and require routine monitoring — typically every 6 months if your condition is stable, or every 3 months if your treatment has recently changed or your blood glucose control is unstable, in line with NICE guidance (NG28)

• Have a condition associated with increased diabetes risk, such as PCOS, cardiovascular disease, or a history of gestational diabetes

• Are taking medicines that may impair glucose regulation

To request an NHS HbA1c test, speak to your GP or practice nurse, who will assess your eligibility and arrange a blood test if clinically indicated. Community pharmacies may participate in NHS Health Check programmes locally, but the availability of NHS HbA1c blood sampling and analysis through pharmacies varies considerably by area — in most cases, blood testing is arranged via GP services. It is advisable to check what is available in your local area.

If you do not currently meet the NHS criteria but remain concerned about your risk, a private test is a reasonable and accessible option. It is worth noting that the NHS Health Check — available every five years to eligible adults — includes a diabetes risk assessment and may lead to an HbA1c test if your risk score is elevated.

If your HbA1c result falls in the high-risk range (42–47 mmol/mol), you may be eligible for referral to the Healthier You: NHS Diabetes Prevention Programme, which provides structured lifestyle support to reduce the risk of developing Type 2 diabetes. Registering with a GP and attending routine health checks remains the most comprehensive way to monitor your long-term metabolic health within the NHS framework.

Frequently Asked Questions