Private Urea and Electrolytes (Kidney Function) Blood Test London
Urea and Electrolytes (Kidney Function) is a private test offered at our clinic in Marylebone, London. It should be ordered and interpreted by a registered clinician based on your symptoms and clinical context.
Urea and Electrolytes (Kidney Function)
Test fee £64 + £50 phlebotomy fee (per visit)
- Results in 1 day"
- UKAS accredited laboratory
- Professional phlebotomy service
- Confidential results portal
Or call 020 7183 0692
Pay at clinic on the day of your appointment
Kidney Function Blood Test (Urea & Electrolytes) in London
The Kidney Function (Urea & Electrolytes) blood test available at Wimpole Street Medical & Dental is a clinically trusted kidney function blood test used to measure kidney-related blood markers associated with filtration and electrolyte balance.
This test is often referred to as a renal function test and is commonly requested for laboratory assessment, monitoring, or routine health screening. It provides insight into kidney-related markers and is widely used as part of general health testing.
What Does the Urea & Electrolytes Test Measure?
Together, these markers provide an overview of kidney-related blood values.
Urea
A waste product formed from protein metabolism.
Creatinine
Used to calculate estimated glomerular filtration rate (eGFR).
Sodium
Essential for fluid balance and nerve function.
Potassium
Important for heart rhythm and muscle function.
Chloride & Bicarbonate
Contribute to acid–base balance.
eGFR (Estimated Glomerular Filtration Rate)
A calculated laboratory value commonly used to reflect kidney filtration.
Why You May Need a Blood Test for Kidney Function
Many patients also choose a private kidney function test proactively, even without symptoms.
Persistent fatigue or weakness
Swelling of ankles, feet, or hands
Changes in urination (frequency, colour, or volume)
High blood pressure
Diabetes or cardiovascular disease
Long-term medication use (e.g. blood pressure drugs, anti-inflammatories)
Family history of kidney disease
Understanding Kidney Function Test Results
Results are provided without clinical interpretation and should be reviewed by a GP or specialist alongside symptoms and medical history.
Normal urea, creatinine, and electrolytes
Values within expected ranges.
Raised creatinine or low eGFR
Values outside reference ranges.
Electrolyte imbalances
Variations in sodium, potassium, or bicarbonate levels.
Borderline results
May be monitored with repeat laboratory testing.
Who Should Consider a Private Kidney Function Test?
This blood test for kidney function is commonly used as a first-line laboratory assessment.
Want fast access to laboratory kidney testing
Are monitoring diabetes, hypertension, or cardiovascular conditions
Are taking medications that may affect kidney-related blood markers
Have a family history of kidney disease
Want reassurance through routine laboratory screening
How the Test Works
Book Online or Walk-In
Choose a time that suits you at our Wimpole Street clinic (22 Wimpole Street).
Sample Collection
A trained nurse performs a standard venous blood draw.
Lab Analysis
Your sample is sent to our UKAS-accredited laboratory.
Results Delivery
You will receive a written laboratory results report, typically within 24 hours.
Kidney Function Blood Test Results & Turnaround
Results may be shared with your GP or specialist for further medical assessment if required.
Fast turnaround time (typically within 1 working day)
Results delivered via a secure, confidential online portal
Clear reporting of all kidney and electrolyte markers
Why Choose Wimpole Street Medical & Dental?
Our clinic at 22 Wimpole Street is easily accessible from across London, including Marylebone, Mayfair, Westminster, and Fitzrovia.
Nurse-led venous blood collection
UKAS-accredited laboratory analysis
Rapid and reliable results
Confidential, discreet service
Convenient Central London location
Kidney Function Blood Tests as Part of Ongoing Health Monitoring
A kidney function blood test can be taken alone or alongside other blood tests for a broader assessment of your health. Repeat testing may be used to track laboratory values over time, based on personal preference or external medical advice.
What is a Kidney Function Blood Test?
A kidney function blood test evaluates how well your kidneys are reflected through waste products and electrolyte levels in the blood. The kidneys are vital for:
- Filtering toxins and waste
- Balancing fluids and salts
- Regulating blood pressure
- Supporting bone and heart health
Your Appointment, Step by Step
Reserve Online
Pick a date and time that fits your diary
Come to Marylebone
22 Wimpole Street, near Bond Street & Oxford Circus
Sample Taken by a Nurse
A brief, gentle blood draw, around 5 minutes
Report Delivered Securely
Results in 1 day"
Frequently Asked Questions
What patients most often want to know before this test
Book Your Kidney Function Blood Test in London
If you are looking for a private kidney function test in Central London, our clinic offers accurate laboratory testing with fast results.
Find Us in Marylebone
In the heart of London's Harley Street medical district, moments from Oxford Street
Address
Wimpole Street Medical & Dental
22 Wimpole Street
Marylebone
London W1G 8GQ
Getting Here
- Short walk from Bond Street station (Elizabeth, Central & Jubilee lines)
- Oxford Circus (Victoria, Central & Bakerloo lines) also nearby
Opening Hours (from 1 October 2026)
- Monday, Wednesday9am - 6pm
- Tuesday, Thursday9am - 8pm
- Friday8am - 5pm
- Saturday10am - 4pm
- SundayClosed
Contact
Arrange Your Test in Marylebone
You won't need a GP referral, simply reserve a slot online and visit us at 22 Wimpole Street. Your report follows within 1 day".
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Meet Our Medical Team
Our experienced medical team is fully qualified and registered with the GMC and NMC, delivering safe, high-quality care in line with the highest professional standards.
Because our patients deserve nothing less.
Registered. Regulated. Trusted.
At Wimpole Street Medical & Dental, our clinicians are registered with the relevant UK regulatory bodies, including the GDC, GMC and NMC. Our dentists, dental nurses and medical professionals deliver care that meets the highest clinical, safety and ethical standards, because our patients deserve nothing less.
We Accept All Major Dental Insurances
We accept all major UK dental insurances, including AXA PPP Healthcare Dental Cover, Aviva Dental Insurance, Bupa Dental Cover, Cigna Dental Insurance, Vitality Dental Health Insurance, Unum and Boots Dental Plan Cover. We provide itemised receipts so you can claim back your treatment costs.
