Comprehensive blood test: price, reimbursement, with or without a prescription, what it covers

The “comprehensive blood test” has no official definition: it is the set of tests a doctor considers useful for a given person, often around a dozen parameters. When prescribed, it is reimbursed at 60% by French National Health Insurance (Assurance Maladie), with the rest generally covered by your supplementary health insurer (mutuelle). Without a prescription, expect to pay about €45 to €65 (ballpark figures from third-party websites, September 14, 2026).

What does a comprehensive blood test include?

There is no official list for a “comprehensive blood test.” In practice, when we prescribe a broad blood test for an adult with no particular complaint, we choose around a dozen parameters that answer three questions: how the blood itself is doing, how the metabolism is doing, and how the filtering organs (kidneys, liver) are doing. The rest is added according to age, medical history and symptoms.

Here are the most common tests and what they look for. We deliberately do not give reference values: they vary by laboratory and by person, and your lab report always shows them next to your result.

• Complete blood count (CBC): a count of red blood cells, white blood cells and platelets. It points toward anemia, infection, inflammation or a bone marrow abnormality.
• Fasting blood glucose: the level of sugar in the blood. It is the screening test for type 2 diabetes; glycated hemoglobin (HbA1c) can complement it in certain situations.
• Lipid panel (investigation of a lipid abnormality): total cholesterol, HDL, LDL and triglycerides. It feeds into the calculation of 10-year cardiovascular risk.
• Creatinine with estimated glomerular filtration rate: a reflection of kidney function.
• Liver enzymes (AST, ALT), often with GGT: possible liver damage, whether related to alcohol, excess weight, a medication or a virus.
• TSH: the hormone that controls the thyroid. It is not routine, but we readily order it in cases of fatigue or unexplained weight gain or loss.
• Depending on the context: ferritin, CRP, electrolytes, uric acid, vitamin D, serology tests, PSA in men after a discussion of its limitations.

Why is there no standard list?

Because a test is only useful if it answers a question asked before the blood draw. A test ordered “just to see” regularly produces a result slightly outside the reference range, with no consequence for health, but which causes worry and triggers follow-up tests. Medicine calls this quaternary prevention: avoiding care that brings no benefit. A blood test is therefore “comprehensive” when it covers what is relevant for you, not when it is long. What each parameter measures is detailed on our page about blood biomarkers.

How much does a comprehensive blood test cost, with and without a prescription?

With a prescription, French National Health Insurance reimburses 60% of the rate for routine tests, 70% for pathology procedures and 100% in certain situations (for example, a long-term condition or maternity). Without a prescription, everything is out of pocket: third-party websites consulted on September 14, 2026 (selectra.info, goodassur.com) give a ballpark figure of €45 to €65 for a basic blood test at a laboratory.

These ballpark figures apply to a basic blood test; each specialized test added increases the bill. The laboratory will inform you of its billing rules for tests without a prescription before the blood draw.

Can you get a comprehensive blood test without a prescription?

Yes, for most routine tests: you can go to a medical laboratory and request a blood test, which the laboratory will perform and send to you. The large laboratory networks even offer packaged “no-prescription blood tests.” What changes is reimbursement, which disappears, and medical support, which is no longer guaranteed.

You gain speed and autonomy: no prior consultation, results within a few days. You lose three things. Reimbursement: the same blood draw with a prescription would have cost 60% less, and often nothing with supplementary coverage. Interpretation: an isolated result says little without your medical history, your treatments and your previous results. Follow-up: an abnormality requires a consultation anyway, sometimes a new blood draw. In addition, constitutional (inherited) genetic tests, which are regulated by law, still require a prescription and written consent.

Without a prescription, two fully covered (100%) alternatives exist: the preventive health examination at a health examination center, which includes, depending on your profile, a blood draw and a medical consultation; and the prevention check-up at the four key ages, which involves no blood draw but can lead to a targeted prescription. Details in French National Health Insurance’s free health check.

When is a comprehensive blood test useful, and when is it not?

A blood test is useful when it answers a specific question: a symptom to investigate, a chronic disease to monitor, a treatment to check, screening justified by age or a risk factor. It is much less useful when it serves to “reassure yourself” for no reason or when it is repeated every year out of habit.

Situations where we readily prescribe it

• Symptoms: persistent fatigue, shortness of breath, weight loss, unusual thirst, joint pain. The blood test is then guided by the complaint.
• Targeted screening: fasting blood glucose in adults over 45 with at least one risk factor for diabetes, as recommended by the French National Authority for Health (HAS); a lipid panel to estimate cardiovascular risk between ages 40 and 69.
• Family history: diabetes, early high cholesterol, kidney disease, a cardiovascular event in a parent at a young age.
• Monitoring a disease or treatment: diabetes, treated hypertension, thyroid disease, medications that require monitoring of the kidneys or liver.

Situations where it adds little

• The routine annual “comprehensive” blood test in a healthy adult with no risk factors: it generates meaningless borderline results and cascades of tests.
• Tests without an indication (vitamin D for everyone, hormones “to check,” tumor markers outside cancer follow-up): their predictive value is low out of context.
• A blood test instead of a consultation: a blood draw measures neither blood pressure, nor smoking, nor physical activity, which weigh more heavily on long-term risk.

In consultation, we start from the question “what would I do differently depending on the result?” If the answer is “nothing,” the test can wait.

What does a 249-biomarker metabolomic panel add?

A metabolomic panel by nuclear magnetic resonance (NMR) quantifies 249 metabolic biomarkers from a single blood sample: lipoproteins detailed by class and size, fatty acids, amino acids, glycolysis markers, ketone bodies, and the inflammation marker GlycA. It does not replace the CBC, creatinine or TSH; it adds dozens of metabolic variables where a standard blood test measures four or five.

The reference panel is Nightingale Health’s, characterized in 118,461 participants of the UK Biobank cohort (Julkunen et al., Nature Communications, 2023). In the same cohort, Buergel et al. (Nature Medicine, 2022) showed that the metabolomic profile improves the prediction of 10-year risk for several diseases, 24 in total in this study, compared with conventional risk factors. These are research results at the population level; how they translate into individual decisions is under study, and we do not present this panel as “more accurate” than a standard blood test in the absence of a comparative study in community practice.

We describe the technique, its limitations and its uses in detail on our page about NMR metabolomics. Laboratory physicians (biologistes) who wish to offer this panel to their patients will find the integration terms on our page for laboratories.

How much do extended blood tests from private providers cost?

In 2026, several private providers offer “enhanced” blood tests, with 90 to 180 biomarkers depending on the offer, without a prescription and not reimbursed, at prices ranging from €365 to €990 for entry-level plans. The table below shows the prices recorded on September 14, 2026 on the operators’ websites or in the press, alongside French National Health Insurance’s preventive health examination.

Each offer has its own logic: Lucis relies on an extensive laboratory network and an annual subscription with two blood tests; Zoī combines the blood draw with time on site with professionals at its Paris center; Osyva builds its program around twelve months of nutritional support. The preventive health examination remains the only one to include a medical consultation at no cost. We compare them in detail, debate included, in private check-up or covered check-up: which to choose?.

How should you talk to your doctor about it?

The most effective approach is to come with a question rather than a list of tests: “my father had a heart attack at 55, what should be checked?” opens a more useful discussion than “I’d like a comprehensive blood test.”

1. Bring your previous results, including those from a blood test done without a prescription, at a private center or from a metabolomic panel: the change in a parameter over time often matters more than its isolated value, and a doctor can read an extended report as additional information.
2. List your known family history: diabetes, cholesterol, early cardiovascular disease, cancers, thyroid or kidney disease.
3. Describe your habits without embellishing them: smoking, alcohol, physical activity, sleep, diet. They are what guide the choice of tests.
4. Ask what will be done with the result: which threshold would trigger what? This question avoids tests without consequences.
5. Make the most of the prevention check-up: at the four key ages (18–25, 45–50, 60–65 and 70–75), the prevention check-up is a dedicated time, fully covered (100%), when a targeted prescription can be decided.

Key takeaways

• The “comprehensive blood test” has no official definition: it is around a dozen parameters chosen for you (CBC, blood glucose, lipid panel, creatinine, liver enzymes, TSH depending on the case).
• With a prescription, French National Health Insurance reimburses 60% of the rate, with supplementary insurance generally covering the rest; without a prescription, expect about €45 to €65 for a basic blood test (third-party websites, as of September 14, 2026), not reimbursed.
• A blood test is useful when it answers a specific question; repeated every year for no reason, it mostly produces false positives.
• An NMR metabolomic panel adds 249 biomarkers to the standard blood test; UK Biobank studies show improved prediction at the population level, not yet an individual decision rule.
• French National Health Insurance’s preventive health examination remains the only offer including a blood draw and a medical consultation at €0.

What Sokrate lets you do

Sokrate publishes a service integrated into the prevention check-up, fully covered (100%) by French National Health Insurance with no upfront payment. You prepare your check-up online with the Sokrate 360 adaptive questionnaire, which explores nine dimensions of your health; a doctor signs your Personalized Prevention Plan and, unless you object, a letter is sent to your regular doctor (médecin traitant). A 249-biomarker metabolomic panel can complement this pathway, in agreement with your doctor. Join the waitlist.