Is This Blood Test Covered by the NHS? A Plain-English Lookup Guide

The most common question we get is some version of “will the NHS pay for this one?” It is a fair question, and the honest answer is usually: it depends less on the test and more on you. The NHS does not have a price list of approved blood tests. It has clinical criteria. Whether a test is “covered” comes down to whether your situation matches those criteria.

This guide walks through the tests people ask about most, what the NHS rules actually say, and what you pay if you go private instead. Prices below come from our live comparison database, so they shift as providers adjust theirs. The cheapest private vitamin D test, for example, currently sits at £8.

How NHS coverage of blood tests actually works

If a test is clinically indicated, meaning your GP judges it necessary based on your symptoms, your history, or a condition you already have, the NHS covers it in full. Free at the point of use, no charge for the sample, the lab work, or the result.

The catch is what counts as indicated. The NHS works from national guidance, mainly from NICE, and that guidance is stricter than most people expect. Doctors are actively discouraged from ordering tests where a positive result would change nothing. NICE tells health professionals to test vitamin D only when someone has symptoms of deficiency or sits in a very high risk group. Its guidance on routine testing sums the logic up: a test that produces numbers without changing what happens next just creates anxiety and follow-up work with no health gain.

There are three broad buckets:

Routinely offered when there is a clinical reason. Full blood count, thyroid function, HbA1c, kidney and liver panels, cholesterol as part of a cardiovascular risk assessment, iron studies for suspected anaemia. Symptomatic patients get these without argument.
Restricted or discouraged without a good reason. Vitamin D without deficiency symptoms, testosterone without convincing symptoms, repeated monitoring tests when results have stabilised. You can often get them, but expect questions.
Screening tests the NHS runs for specific groups only. Bowel cancer screening FIT kits for adults aged 54 to 74, abdominal aortic aneurysm screening for men at 65, diabetic eye checks. These are population programmes with fixed eligibility, and they only cover the conditions on their list.

Notice what is missing from that third bucket. There is no NHS screening programme for thyroid, vitamin D, testosterone, or most hormone panels, because the UK National Screening Committee judges that screening healthy people for these does more harm than good. Private testing exists to sell the tests the NHS deliberately will not hand out to the worried well.

Thyroid tests: free if you have symptoms, restricted if you do not

NHS coverage for thyroid testing is generous if you have symptoms. Tiredness, weight change, feeling the cold, heart palpitations, a family history of thyroid disease, any of these and a GP will typically order TSH, often with free T4, straight away. Once you are diagnosed and on levothyroxine, annual monitoring is standard and covered.

Where it tightens is testing without symptoms. Guidance discourages screening the general population, and some practices push back on requests for a “just checking” thyroid panel. Private options fill that gap. A thyroid function test starts at £37 from Randox, with Medichecks’ standard panel at £45 and more comprehensive profiles climbing from there.

Vitamin D: the NHS will test only if you are at risk, and rarely otherwise

Vitamin D is the classic example of a restricted test. NICE guidance is blunt: do not routinely test vitamin D status unless the person has symptoms of deficiency, is at particularly high risk from very low sun exposure, or has a clinical reason such as osteomalacia or recurrent falls. Everyone else is advised to supplement through autumn and winter rather than test, because a low number in an asymptomatic person changes nothing: you take a supplement either way.

If you have symptoms such as deep bone or muscle pain, or you are in a high risk group, say so at the appointment and a test is usually arranged. Otherwise the NHS route stops at “take a supplement”. That leaves a large market for home testing: from £8 for a rapid result kit at MyHealthChecked, £29.99 for a lab-analysed kit from BetterYou, £39 at Medichecks, up to £50 at Forth. Prices for the lab-based tests sit in a narrow band, roughly £30 to £50.

PSA and prostate screening: available on the NHS, but only if you ask

This one surprises people. Any man over 50 can ask his GP for a PSA test and, once the risks have been explained, the NHS will do it free. The right to request is written into NICE guidance on prostate cancer. What the NHS does not do is invite men or run a national screening programme. The UK National Screening Committee reviewed the evidence again in 2025 and decided the harms of screening the general male population, mainly false positives and unnecessary treatment, outweigh the benefits.

A few practical notes. Men over 50 who want the test should ask for it directly. Men with a BRCA gene variant or a family history face different odds, and the screening committee has consulted on offering screening to men with confirmed BRCA variants from age 45. And men with urinary symptoms should see a GP regardless, because that is investigation rather than screening. If the NHS queue does not appeal, private PSA tests run from £12 at Lola (add-on) or £45 at Medichecks.

Coeliac disease: free on the NHS, with one strict condition

Suspected coeliac disease is firmly in the “NHS pays” bucket. Coeliac disease is a serious autoimmune condition, and NICE guidance says anyone with symptoms should be offered serological testing, usually tTG IgA with total IgA, free of charge.

The condition that trips people up is the gluten. For the antibodies to show up in a blood test, you need to have been eating gluten in more than one meal a day for at least six weeks. Going gluten-free before testing is the single most common way people accidentally ruin their own diagnosis, because the antibodies fade once gluten is gone. Eat gluten, get tested, then go gluten-free if the result is positive.

Private testing exists mainly for people who want the answer before joining an NHS queue. Options run from £65 at Bluecrest to £179 for a full coeliac screen at Goodbody Clinic.

Iron, ferritin and anaemia: free if anaemic, and the follow-up matters

Feeling worn out is one of the most common reasons people see a GP, and tiredness alone does not automatically unlock a ferritin test. Anaemia symptoms or signs do: pallor, breathlessness, dizziness, heavy periods. If an NHS full blood count then shows iron deficiency anaemia, ferritin and iron studies follow free, and the investigation gets serious, because in men and postmenopausal women, iron deficiency anaemia triggers a search for bleeding in the gut. NICE referral criteria put significant anaemia on the suspected cancer pathway. That is a test the NHS takes very seriously, and it should.

Private iron testing is where it gets cheap: a ferritin test starts at £8 for a rapid home kit at MyHealthChecked, £15 at Lola, £39 at Medichecks. One warning if you go private: a low ferritin result still needs a GP conversation, because the cause matters more than the number.

Cholesterol and cardiovascular risk: covered, through a different door

There is no NHS “cholesterol test” in isolation, but cardiovascular risk assessment is core NHS business. If you are over 40, a routine appointment, an NHS Health Check (offered to adults in England aged 40 to 74), or any blood pressure or diabetes review will typically include a lipid panel, free. GPs use the numbers to calculate your QRISK score and decide whether statins or lifestyle changes make sense.

The private market exists for people who want the number without an appointment. Full lipid panels start at £39 at Medichecks, £40.60 at Numan.

Hormones: testosterone, menopause and fertility

This is where NHS coverage gets most arbitrary from the patient’s point of view.

Testosterone

The NHS will test men with symptoms of low testosterone, low mood, fatigue, erectile dysfunction, loss of muscle, often alongside prolactin and other pituitary markers. Women get much the same for suspected PCOS. What the NHS resists is testing on vague complaints, because a borderline number in an asymptomatic man leads somewhere expensive and unhelpful. Private tests start at £15 at Lola or £19 at Medichecks.

Menopause and perimenopause

NICE guidance is explicit that FSH testing is rarely needed to diagnose perimenopause in women over 45, because symptoms make the diagnosis and hormone levels swing so much in this phase that a single result misleads. The NHS treats it accordingly: usually no test at all. Women under 45 with atypical symptoms, or anyone wanting numbers before making decisions about HRT, have a private market waiting: menopause profiles from £55 at YorkTest, £57 at MyHealthChecked, £58.31 at Numan.

Fertility and ovarian reserve

AMH testing sits in a grey zone. The NHS covers fertility investigations for couples who meet the eligibility rules, typically a defined period of unprotected intercourse without conception, and AMH is part of that work-up in many areas. What the NHS does not do is hand out AMH tests to women who are simply curious about their ovarian reserve. Private AMH tests start at £79 at Medichecks and climb past £120 elsewhere. If you are considering egg freezing, a private baseline AMH is often the first practical step.

HbA1c and diabetes: free if you are symptomatic or at risk

The NHS covers HbA1c testing for anyone with symptoms of diabetes, for people with known diabetes (annual reviews), and for adults with elevated risk factors such as obesity or a family history. NHS Health Checks also catch undiagnosed type 2 diabetes in the over-40s. This is one of the least restricted tests on the list, and rightly so.

The private case is weaker here than for vitamin D, but it exists: an HbA1c test starts at £15 at Lola or £46 at Medichecks. If you already know you have prediabetes and want to watch the trend between annual reviews, private testing fills that monitoring gap, because the NHS will not re-test more often than its schedule allows.

Tests the NHS will rarely fund at all

Some tests sit outside NHS practice almost entirely, whatever your symptoms:

Food intolerance (IgG) tests. The NHS does not use IgG food testing, and the European Academy of Allergy and Clinical Immunology advises against it as a diagnostic tool: food-specific IgG antibodies show that you have eaten a food, not that you react badly to it. If you suspect a genuine allergy, the NHS route is IgE testing through a specialist allergy service.
Comprehensive wellness panels that bundle twenty or thirty markers for asymptomatic people. The NHS would call these unnecessary; private providers sell them as MOTs.
Prenatal sex determination and direct-to-consumer genetic risk tests that have no clinical pathway attached.

A private result is a data point, not a diagnosis, and for tests in this bucket the NHS will not re-do them or act on them without its own clinical assessment.

So when does paying privately make sense?

From everything above, a pattern emerges. Paying privately makes sense in four situations:

The NHS restricts the test for asymptomatic people, and you want the number anyway: vitamin D, testosterone, AMH.
You want to monitor a known result between NHS review cycles: HbA1c, cholesterol, thyroid.
The wait matters. If a GP has already agreed you need a test but the appointment is weeks out, paying £39 to know today versus waiting six weeks is a personal trade-off, and neither answer is wrong.
You want control of the follow-up. A private report shows every marker with its reference range, and you can repeat it whenever you like.

When to use the NHS instead: anything with red-flag symptoms, anything involving a possible cancer diagnosis, and anything where a positive result immediately triggers specialist care. A private PSA of 12 or a ferritin that suggests bleeding needs a clinician, not a repeat kit.

What the private route costs, at a glance

To compare vitamin D and ferritin test prices across all providers, visit our compare page to search for vitamin D or ferritin tests.

The table below shows current cheapest prices for the tests covered above. Every price was checked against the provider’s own product page at publication.

Provider	Test	NHS criteria?	Price	Link
MyHealthChecked	Vitamin D Rapid Test	Only with symptoms / high risk	£8	View test£8
Lola	HbA1c	Symptomatic or at-risk adults	£15	View test£15
Lola	Ferritin	Anaemia symptoms or signs	£15	View test£15
Randox	Thyroid Function Test	Symptoms, family history	£37	View test£37
BetterYou	At-Home Vitamin D Test Kit	Only with symptoms / high risk	£29.99	View test£29.99
Medichecks	Vitamin D (25 OH) Blood Test	Only with symptoms / high risk	£39	View test£39
Medichecks	Cholesterol Blood Test	Via NHS Health Check / risk assessment	£39	View test£39
Medichecks	PSA Blood Test	Men 50+, on request	£45	View test£45
Medichecks	Diabetes (HbA1c) Blood Test	Symptomatic or at-risk adults	£46	View test£46
Goodbody Clinic	Coeliac Screen Blood Test	Symptoms, while eating gluten	£179	View test£179

What to do if a private result comes back out of range

The guidance changes depending on which test it was:

Out of range thyroid (TSH or T4): book a GP appointment with the numbers in hand. Thyroid treatment decisions need clinical context, and a repeat NHS test will confirm before anything is prescribed.
Low vitamin D: start a supplement, 10 micrograms daily through autumn and winter is the standard adult advice, and re-test in three to six months if symptoms persist. No GP visit needed for a mild deficiency without symptoms.
Raised PSA: see a GP promptly. A single raised PSA is not a cancer diagnosis, roughly three quarters of men with a raised PSA do not have prostate cancer, but it always needs proper follow-up.
Positive coeliac antibodies: do not start a gluten-free diet yet. You need a referral for confirmation, and the confirmation tests work better with gluten still in your diet.
Low ferritin with no obvious cause, especially in men or after menopause: book a GP appointment. The number matters less than finding why it is low.
HbA1c in the prediabetes range: diet and activity changes genuinely work at this stage, and your GP can arrange structured support. Re-test in three to six months.

The single most useful habit, whichever route you test through, is taking the report to a clinician before you act on it. Numbers in a PDF are a starting point for a conversation, and GPs see private reports regularly.

To compare prices across all providers for whichever test you are considering, head to our compare page and search for the marker, sorting price low to high. For a broader look at how the two routes stack up overall, our guide to NHS vs private blood tests covers the trade-offs in more detail.

Header image from Pexels

Disclaimer: This article is for information only and is not a substitute for professional medical advice. Always consult a GP or qualified healthcare provider before making decisions about your health. Prices were accurate at time of publication but may change.