Kidney Function Blood Test London
Kidney Function Blood Test at 117a Harley Street, London, from £73.75, with results in 1 working day. The Urea and Electrolytes profile checks creatinine, eGFR, urea and electrolytes to assess kidney filtration and fluid or electrolyte balance. Laboratory testing starts from £73.75.
Est. 1984
Trusted clinical caresince 1984
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The Urea and Electrolytes profile checks creatinine, eGFR, urea and electrolytes to assess kidney filtration and fluid or electrolyte balance.
Your test option
Select a profile to see every included analyte before you book.
What does a kidney blood test show?
This profile reports creatinine with eGFR (estimated glomerular filtration rate), an estimate of how well the kidneys filter waste from the blood, together with urea, sodium, potassium, chloride and bicarbonate.
A blood result alone can miss important kidney disease. Assessment may also include urine protein testing and blood-pressure review alongside these blood results.
Urea and Electrolytes (U/E)
Urea and Electrolytes
U/E · £73.75
Analytes: Urea; Creatinine (including eGFR); Sodium; Potassium; Chloride; Bicarbonate
Turnaround: Usually 1 working day
- •Creatinine and eGFR: kidney filtration estimate
- •Urea: waste product cleared by the kidneys
- •Sodium, potassium, chloride and bicarbonate: electrolytes relevant to fluid balance
Have a doctor review your kidney result
Urea, creatinine and electrolytes are affected by hydration, muscle mass, diet and medicines such as blood pressure tablets and anti-inflammatories. A private GP reads the result against your medicines and blood pressure, and agrees whether a repeat test or a urine test is needed.
If you take a medicine that needs kidney monitoring, the doctor can confirm how often to test.
- •Book a GP consultation first if you want your blood pressure and medicines reviewed with the test
- •The report is usually ready within 1 working day
- •Book a follow-up consultation to go through the result and agree the next step
GP Consultation
£150
Discuss blood pressure, diabetes, medicines and any urinary symptoms, and agree which tests to request.
Follow-Up Consultation
£100
For existing patients: go through your result with a doctor and agree the next step.
Only need the laboratory test? Our sister clinic lists the urea and electrolytes profile at Blood London.
Blood pressure, diabetes and medicine monitoring
Patients with diabetes are often also offered HbA1c testing as part of metabolic monitoring.
- •Diabetes or high blood pressure
- •Monitoring medicines that can affect kidney function
- •Previous abnormal kidney results
- •Swelling, reduced urine output or other symptoms your clinician wants to assess with blood tests
Hydration and medicines
No routine fast is required. Arrive normally hydrated, and mention medicines or supplements that can affect kidney results.
The report is usually ready within 1 working day.
Why a blood result is only part of kidney assessment
- •eGFR is an estimate and can be influenced by age, muscle mass and short-term illness.
- •Blood testing may need to be combined with urine testing and blood-pressure assessment.
Usually 1 working day. Your laboratory report is supplied securely.
The blood-test price covers the laboratory report, not a consultation. A separate GP consultation is £150 if you want a doctor to interpret the result with your symptoms and history.
Urgent care is the safer first step when you cannot pass urine, have severe swelling with breathlessness, or collapse with confusion.
Source: NHS chronic kidney disease diagnosis.
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Sources & References
- Kidney assessment may include eGFR blood testing, urine testing and blood-pressure review. - NHS chronic kidney disease diagnosis[Link]
Dr Penny Sheehan
Health Screening, Paediatrics and Menopause • GMC 6056535
“Dr Sheehan works in women's health, menopause care and health screening. She has training and experience in weight management, including GLP-1 receptor agonist prescribing, and a special interest in paediatric assessment.”
Service information reviewed 26 August 2026.
What our patients say
“Quick, painless draw and 4-hour results”
“Had an appointment at 1:30 PM but got there early and the staff were happy to draw my blood earlier since there was availability. Quick and painless process with a professional phlebotomist. The turnaround time stated on the website for the test was 4 hours, and sure enough, I received my results super easy with no issues. Would recommend this service.”
“Heard, understood and reassured”
“The clinic is warm and welcoming. In my experience, every time I was there, I found myself heard and understood. My health issues have been tackled in the best of ways. Miss Arjeta is absolutely a master of blood tests, you will not feel anything. Dr Bakhtiar is knowledgeable and calm, I always feel reassured after speaking to him. I genuinely recommend this clinic.”
“Results faster than expected at a walk-in clinic”
“I recently had a blood test for rabbit allergies at Medical Express Clinic, and I'm extremely pleased with the service. Not only did I receive my results faster than expected, but the receptionist was fabulous, she answered all my questions and accommodated all my requests. It's the only walk-in clinic I found in central London with reasonable prices. Highly recommend this clinic!”
Common questions
Do I need to fast?
A routine fast is not required. Arrive normally hydrated.
What does eGFR mean?
eGFR (estimated glomerular filtration rate) is an estimate of how well the kidneys filter waste from the blood. Age, muscle mass and short-term illness can affect it, so a clinician may also look at urine protein and blood pressure.
Can a doctor go through my result with me?
A private GP consultation is £150, and a follow-up consultation for existing patients is £100. The doctor reviews the result alongside your symptoms and agrees the next step.
