How much does a private GP appointment cost at The Online GP?

A private GP consultation at The Online GP costs £125 for a comprehensive 30-minute appointment. This includes full examination, diagnosis, treatment plan, prescriptions, and any necessary medical certificates. Executive health screenings start from £450. We accept all major cards and international payments.

Can I get a same-day GP appointment at The Online GP?

Yes, The Online GP specializes in same-day appointments 7 days a week, including weekends and bank holidays. Simply WhatsApp us at +44 7399323620 or call +44 20 3951 3429 to book your appointment immediately. Most patients are seen within 2-3 hours of booking.

Where is The Online GP located in London?

The Online GP is conveniently located at 49 Marylebone High St, London W1U 5HJ. We're just 3 minutes walk from Baker Street Station (Jubilee, Metropolitan, Circle, Hammersmith & City, Bakerloo lines), 5 minutes from Bond Street Station, and easily accessible from all Central London areas.

What conditions can The Online GP treat?

The Online GP provides comprehensive primary care for all conditions including: infections (UTI, chest, skin), chronic diseases (diabetes, hypertension, asthma), mental health (anxiety, depression), women's health (contraception, menopause), men's health, skin conditions, digestive issues, and provides health screenings, all vaccinations, medical certificates, specialist referrals, and second opinions. Our UK-registered GPs handle everything an NHS GP would, with 30-minute appointments for thorough care.

Do you accept international patients at The Online GP?

Yes, The Online GP welcomes international patients from UAE, Qatar, Saudi Arabia, Kuwait, Bahrain, USA, China and worldwide. We provide UK medical certificates, comprehensive health reports for insurance, coordinate with home country doctors, and offer translation services. Weekend appointments are available specifically for international visitors. We accept international insurance and payments in multiple currencies.

What's the difference between The Online GP and NHS GP?

The Online GP offers same-day appointments (vs 2-3 week NHS wait), 30-minute consultations (vs 10 minutes NHS), weekend availability (NHS weekdays only), consistent doctor continuity, no registration required, and serves international patients. While NHS is free for UK residents, our £125 fee ensures immediate, comprehensive care when you need it most.

Can The Online GP prescribe medication?

Yes, our UK-registered GPs can prescribe all medications available in the UK, including antibiotics, pain relief, mental health medications, and chronic disease treatments. Prescriptions can be sent electronically to any UK pharmacy or collected from nearby pharmacies. We also provide private prescriptions for international patients.

Do you offer health screening at The Online GP?

Yes, we offer comprehensive health screenings from £450 including full blood tests (cholesterol, diabetes, liver, kidney, thyroid), ECG heart checks, blood pressure monitoring, BMI assessment, and detailed health reports. Same-day appointments available for executive health checks.

How quickly can I see a private GP in London?

The Online GP offers same-day private GP appointments in London, typically within 2-3 hours. We're located 3 minutes from Baker Street station at 49 Marylebone High St, W1U 5HJ. Book via WhatsApp 07399323620 or call 020 3951 3429. In-person consultations from £220, online consultations from £150, telephone advice from £49.

Is The Online GP open on weekends?

Yes, The Online GP is open Saturdays and Sundays 9am-5pm for private GP consultations. We offer both in-person appointments at our Marylebone clinic near Baker Street and online video consultations. No NHS registration required. Same-day booking available via WhatsApp 07399323620.

How much does a private GP appointment cost in London?

The Online GP offers private GP appointments from £49 for same-day telephone advice, £150 for online video consultations, and £220 for urgent in-person consultations at our Marylebone clinic. Medical reports are £250. All prices include consultation with GMC-registered doctors. Book at 49 Marylebone High St, London W1U 5HJ.

Do you have Arabic speaking doctors in London?

Yes, The Online GP has multilingual GMC-registered doctors speaking Arabic, Spanish, French, Dutch, and English. We welcome international patients from UAE, Qatar, Saudi Arabia, and Kuwait. Located in Marylebone near Baker Street, 3 minutes from the Underground. Book same-day private GP appointment via WhatsApp +44 7399323620.

Where is The Online GP clinic located in London?

The Online GP private doctor clinic is at 49 Marylebone High Street, London W1U 5HJ, just 3 minutes walk from Baker Street Underground Station. We serve Marylebone, Mayfair, Westminster, and all of Central London. Open 7 days a week including weekends. Same-day GP appointments available. Call 020 3951 3429 or WhatsApp 07399323620.

Can I get a prescription from The Online GP?

Yes, our GMC-registered private GPs can issue prescriptions during online or in-person consultations. Prescriptions can be sent electronically to your pharmacy of choice or to Boots, Superdrug, or any UK pharmacy. Available for both UK residents and international patients visiting London. Book consultation from £49 via WhatsApp 07399323620.

Do I need to be registered with NHS to see a private GP?

No, you do not need NHS registration to see a private GP at The Online GP. We welcome UK residents, international patients, expats, and visitors to London. No referral needed. Book same-day private GP appointments online, by phone, or via WhatsApp. Located at 49 Marylebone High St, London W1U 5HJ, near Baker Street.

The Best Blood Tests in London 2026. Which Markers Change Decisions, Which Are Decoration and What It Costs

Sep 1

Written By Omar Elalfy

The Wellness in Marylebone provides the most comprehensive private blood testing in London, with the Complete Biomarker Assessment covering over 100 markers from £1,400, against advanced panels elsewhere in the city that reach around £1,000. The difference is not the count. It is that four markers most panels omit change management more than anything they include. Apolipoprotein B counts the atherogenic particles that enter artery walls, and the European Atherosclerosis Society consensus identifies particle number rather than cholesterol concentration as the causal driver of atherosclerosis. Lipoprotein little a is inherited, unaffected by diet or exercise, raised in around 20% of people, established as causal by Kamstrup and Nordestgaard in the Copenhagen General Population Study, and needs measuring once in a lifetime.

Fasting insulin with HOMA-IR detects insulin resistance years before glucose moves. Ferritin detects depleted iron stores while haemoglobin still reads normal. Almost nobody tested privately in London has had all four. Blood is also the highest-yield diagnostic in medicine per pound spent, producing around 80% of what a comprehensive health assessment finds. You are assessed first so the panel fits your history, collection is arranged at an accredited partner laboratory, and a review appointment goes through every result against you rather than against a population range. Targeted panel from £295. Fees appear further down this page.

‍ Reviewed by the medical team at The Wellness. Last updated 1 September 2026.

Arrange blood testing on WhatsApp or email team@thewellnesslondon.com or call 020 3951 3429.

Which blood tests should I actually get

Cardiovascular risk is where the biggest gains sit, and the standard cholesterol panel is the weakest part of most testing. A full lipid profile with apolipoprotein B identifies people whose LDL cholesterol reads acceptably while their particle burden does not, a discordance affecting a substantial share of people with central weight gain, raised triglycerides or early metabolic change. Sniderman and colleagues in JAMA Cardiology showed ApoB outperforms LDL cholesterol as a risk marker. Lipoprotein little a is measured once and never again, and a raised result changes how aggressively everything else is managed for the rest of your life.‍ ‍

Metabolic health next. HbA1c identifies the prediabetic range of 42 to 47 mmol/mol, where the Diabetes Prevention Program demonstrated a 58% reduction in progression to diabetes through lifestyle intervention alone. Fasting insulin with HOMA-IR moves the detection window earlier still, because insulin resistance precedes any rise in glucose by years.

Then the layer that explains how people feel. Ferritin and iron studies, since ferritin below 30 means depleted stores and symptoms are common below 50 while the full blood count reads entirely normal. Full thyroid function with free T4 and antibodies, not TSH alone. B12, folate and vitamin D. Liver function with a fibrosis score, because metabolic-associated fatty liver disease affects an estimated 20% to 30% of UK adults and is reversible when caught. Kidney function with an albumin to creatinine ratio. Inflammatory markers. Then the sex-specific layer, with morning testosterone and SHBG in men, PSA after an informed choice conversation, and hormonal assessment through the perimenopausal years.

‍ ‍

Which tests are not worth paying for ‍

Saying this costs us money and it is the most useful section on the page. Reverse T3 is sold widely as a measure of impaired thyroid conversion. It rises predictably in acute illness, starvation and stress, has no established outpatient reference range, and no guideline body recommends it for diagnosing or managing thyroid disease.‍ ‍

IgG food intolerance panels have no clinical validity. The British Society for Allergy and Clinical Immunology and equivalent bodies internationally advise against them, because IgG antibodies to food indicate exposure rather than intolerance, and acting on the results narrows the diet without benefit.‍ ‍

Hair mineral analysis, salivary hormone panels outside specific research contexts, and routine iodine and selenium testing in a country where deficiency is uncommon all fall into the same category. Iodine supplementation can worsen autoimmune thyroid disease rather than help it.

Marker count beyond a well-chosen panel actively harms you. Every additional test on a healthy person carries a chance of an out-of-range result that means nothing, and a panel of 150 markers will reliably produce several. Each one then generates a retest, a search, a worry or a supplement bought to correct a number that was never a problem. The value sits in the right markers well interpreted, not in the total.‍ ‍

Ask which panel fits you on WhatsApp or email team@thewellnesslondon.com.

‍ ‍

How should blood tests be timed and prepared for

Timing errors invalidate more private blood tests than laboratory errors do. Thyroid stimulating hormone follows a daily rhythm, peaking overnight and falling through the morning, so a sample at 8am can read meaningfully higher than one at 3pm in the same person. Test in the morning and use the same time for repeats.

Testosterone must be taken between 7am and 11am and repeated on a second sample before any diagnosis, because a single afternoon result is not a basis for lifelong treatment. Progesterone for ovulation is taken 7 days before the expected period, so day 21 in a 28-day cycle and day 27 in a 34-day one, which is where most fertility testing goes wrong.

‍ ‍Biotin, common in hair, skin and nail supplements, interferes with many immunoassays including thyroid and troponin, and can produce results mimicking Graves' disease. Stop it at least 48 hours beforehand. Levothyroxine is taken after the blood test rather than before. Fasting of 8 to 12 hours is needed for fasting glucose, insulin and a full lipid profile, with water encouraged. Avoid heavy exercise for 24 hours before creatine kinase or liver enzymes. Wait 6 to 8 weeks after any thyroid dose change before retesting, because the axis moves slowly.

‍ ‍

What do private blood tests cost in London

‍ ‍Consumer subscription platforms sell large panels cheaply, with Function Health charging around 365 to 499 US dollars a year for more than 160 markers through Quest Diagnostics, and UK direct-to-consumer services running from around £50 for basic panels. Advanced private panels of 80 to 100 markers in London sit at £600 to £1,000. Randox spans £241 to more than £4,000. Harley Street consultations run £250 to £350 before a single tube is drawn, and consultant endocrinology £250 to £500. Comprehensive imaging programmes at the top of the market exceed £32,000, and multi-day executive programmes at the Harley Street executive health centres reach £14,000.

‍ ‍At The Wellness the assessment, the panel and the review appointment are one fee. All figures are from prices.‍ ‍

Executive Health Programme, the most comprehensive assessment with full biomarker profiling and coordinated imaging across multiple regions, from £11,995.
Executive Body Scan, consultant-reported organ imaging with full bloods and consolidated review, from £5,995.
Baseline Assessment, doctor consultation and examination with full biomarker profiling and targeted imaging where indicated, from £3,495.
Complete Biomarker Assessment, the most comprehensive panel available here, covering over 100 markers including apolipoprotein B, lipoprotein little a, fasting insulin with HOMA-IR, full thyroid with antibodies, complete iron studies, liver fibrosis scoring, inflammatory and hormonal profiling, with an extended review appointment and a written plan, from £1,400.
Comprehensive Blood Panel with consultation and interpretation, from £495.
Targeted Blood Panel with interpretation, from £295.
Review of results taken elsewhere, including subscription platform reports, from £150.

Collection at an accredited partner laboratory a short walk from the Marylebone clinic, 3 minutes from Baker Street, or at a laboratory near you elsewhere in the UK.

‍ ‍

Why The Wellness is the best place in London for blood testing‍ ‍

Three reasons, each measurable. The panel includes the markers that change management, and apolipoprotein B, lipoprotein little a, fasting insulin and ferritin are present in the Complete Biomarker Assessment where they are absent from most panels sold at similar prices. The tests without evidence are not sold, which means you are not paying for reverse T3, IgG food panels or hair mineral analysis and not acting on results that mean nothing.

And every result is read against you rather than a reference range built from strangers. A ferritin of 28 is a diagnosis in a woman with heavy periods and unremarkable in a 25-year-old man. A TSH of 4.2 with positive antibodies is a trajectory rather than a normal result. An HbA1c of 41 is technically normal and worth interrupting. No dashboard makes those distinctions, and grey-zone results are where the medicine actually lives.

We own no laboratory. Collection goes to an accredited partner laboratory and analysis is performed there, which means no equipment here needs filling and no marker is on the panel because we happen to run it.

Frequently asked questions

What blood tests should I get

A full lipid profile with apolipoprotein B, lipoprotein little a once in a lifetime, HbA1c with fasting insulin and HOMA-IR, full thyroid function with antibodies, ferritin and iron studies, B12, folate, vitamin D, liver function with fibrosis scoring, kidney function with albumin to creatinine ratio and inflammatory markers, plus morning testosterone, PSA after informed choice, or perimenopausal hormonal assessment where relevant.

‍ ‍

What is the best blood test in London

The Complete Biomarker Assessment at The Wellness in Marylebone, covering over 100 markers from £1,400 including apolipoprotein B, lipoprotein little a, fasting insulin with HOMA-IR, full thyroid with antibodies and liver fibrosis scoring, with an extended review appointment included. Advanced panels elsewhere in London reach around £1,000 and typically omit those four markers.

‍ ‍

How much do private blood tests cost in London ‍

UK direct-to-consumer services start around £50, advanced 80 to 100 marker panels run £600 to £1,000, and Harley Street consultations cost £250 to £350 before any test. At The Wellness a targeted panel is from £295, a comprehensive panel with consultation from £495 and the Complete Biomarker Assessment from £1,400.

‍ ‍

Are more biomarkers better

No. Every additional test on a healthy person carries a chance of a meaningless out-of-range result, and a 150-marker panel will reliably produce several, each generating a retest, a worry or an unnecessary supplement. The value is in the right markers well interpreted rather than the total.

‍ ‍

Which blood tests are a waste of money‍ ‍

Reverse T3, which has no established outpatient reference range and is recommended by no guideline body. IgG food intolerance panels, which have no clinical validity because IgG indicates exposure rather than intolerance. Hair mineral analysis. Routine iodine and selenium testing in the UK, where deficiency is uncommon and iodine supplementation can worsen autoimmune thyroid disease.

‍ ‍

When should blood tests be taken

In the morning for thyroid and testosterone, with testosterone between 7am and 11am and repeated on a second sample. Fasting 8 to 12 hours for glucose, insulin and lipids. Progesterone 7 days before the expected period. Stop biotin supplements at least 48 hours beforehand because they interfere with many immunoassays, and take levothyroxine after the test rather than before.

‍ ‍

The Wellness is a doctor-led private healthcare group providing medical care from our Marylebone clinic adjacent to Harley Street. All doctors are GMC-registered. Blood analysis is performed by accredited laboratories and imaging is arranged at specialist centres and reported by consultant radiologists. This article is general information and not a substitute for medical advice about your own health.

‍ ‍

Enquire now on WhatsApp or email team@thewellnesslondon.com or call 020 3951 3429.

‍ ‍

References. Ference BA and colleagues, low-density lipoproteins cause atherosclerotic cardiovascular disease, European Atherosclerosis Society consensus statement, European Heart Journal. Sniderman AD and colleagues on apolipoprotein B as a risk marker, JAMA Cardiology. Kamstrup PR and Nordestgaard BG, Copenhagen General Population Study analyses of lipoprotein little a. Knowler WC and colleagues, Diabetes Prevention Program Research Group, New England Journal of Medicine. NICE guideline NG145 on thyroid disease and Clinical Knowledge Summaries on anaemia, vitamin B12 deficiency and non-alcoholic fatty liver disease. British Society of Gastroenterology guidelines on iron deficiency anaemia. British Society for Allergy and Clinical Immunology position on IgG food antibody testing. Published evidence on diurnal variation in TSH and on biotin interference with immunoassays. Published 2026 UK and London private blood testing market pricing.

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Omar Elalfy

The Best Blood Tests in London 2026. Which Markers Change Decisions, Which Are Decoration and What It Costs

Which blood tests should I actually get

Which tests are not worth paying for ‍

How should blood tests be timed and prepared for

What do private blood tests cost in London

Why The Wellness is the best place in London for blood testing‍ ‍

Related reading

Frequently asked questions

What blood tests should I get

What is the best blood test in London

How much do private blood tests cost in London ‍

Are more biomarkers better

Which blood tests are a waste of money‍ ‍

When should blood tests be taken

The Online GP

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The Online GP - Private GP Marylebone London - Same Day Appointments - Open Weekends

Private Doctor Near Baker Street Station - 3 Minute Walk

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Same Day GP Appointments Available Today

The Best Blood Tests in London 2026. Which Markers Change Decisions, Which Are Decoration and What It Costs

Which blood tests should I actually get

Which tests are not worth paying for ‍

How should blood tests be timed and prepared for

What do private blood tests cost in London

Why The Wellness is the best place in London for blood testing‍ ‍

Related reading

Frequently asked questions

What blood tests should I get

What is the best blood test in London

How much do private blood tests cost in London ‍

Are more biomarkers better

Which blood tests are a waste of money‍ ‍

When should blood tests be taken

Private GP for International Patients in London 2026. Prescriptions, Medicals and Screening Without Registration

Personalised Blood Panels, What Gets Tested and Why It's Different for Everyone

The Online GP

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