Private Kidney Function Tests (Urea & Electrolytes) Test in the City of London
Test price
£64
+ £50 blood draw
Results in 1 day"
Pay at clinic
Complete kidney panel measuring creatinine, urea, eGFR, and electrolytes to assess kidney health.
2 min from St Paul's station · short walk from Bank, Blackfriars & Barbican
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 3709
Pay at clinic on the day of your appointment
The Urea and Electrolytes (Kidney Function) is available at our clinic in The City of London for £64.
* Excluding £50 phlebotomy fee (per visit)
The kidneys are two bean-shaped organs that filter waste products and excess fluid from the blood, regulate electrolyte balance, and help control blood pressure. They process approximately 200 litres of blood every day.
Kidney function can decline gradually over time, often without symptoms until a significant amount of function has been lost. Regular testing is particularly important for individuals with risk factors such as diabetes, high blood pressure, or a family history of kidney disease.
What the Urea and Electrolytes (Kidney Function) Measures
- Creatinine — a waste product filtered by the kidneys; elevated levels may indicate reduced kidney function
- eGFR (estimated glomerular filtration rate) — a calculated estimate of how well the kidneys are filtering waste
- Urea — a waste product from protein metabolism, processed by the kidneys
- Electrolytes (sodium, potassium) — minerals regulated by the kidneys
When This Test May Be Helpful
- Routine health screening
- Diabetes or high blood pressure
- Taking medications that may affect the kidneys (e.g. NSAIDs, certain blood pressure drugs)
- A family history of kidney disease
- Unexplained swelling in the ankles or feet
- Changes in urination frequency or appearance
- Monitoring a known kidney condition
Understanding Your Results
Results are typically available within 1 day" and are delivered securely.
An eGFR above 90 mL/min generally indicates normal kidney function, while values below 60 mL/min sustained over three months may suggest chronic kidney disease. However, eGFR can be affected by age, muscle mass, and other factors.
If your results suggest reduced kidney function, we recommend consulting your GP for clinical interpretation and guidance on any next steps.
Important Information
This test provides laboratory results only and does not include diagnosis or treatment. Kidney function results should be interpreted by your GP in the context of your overall health.
Assess Kidney Health
Kidney function tests are essential for detecting kidney disease and monitoring kidney health.
- Creatinine and urea levels
- eGFR (estimated filtration rate)
- Sodium and potassium
- Early kidney disease detection
- Medication monitoring
- Essential for diabetes care
How It Works
Book Online
Choose a convenient date and time
Visit Our Clinic
Ave Maria Lane, City of London
Quick Blood Draw
Professional phlebotomy - 5 minutes
Get Results
Results in 1 day"
Frequently Asked Questions
Common questions about this blood test
Visit Our London Clinic
Central London location with excellent transport links
Address
St Paul's Medical & Dental
Ave Maria Lane
The City of London
London EC4M 7AQ
Getting Here
- Walking distance from St Pauls, Blackfriars, Bank and Barbican stations
- Circle, District & Piccadilly lines
Opening Hours
Current opening hours:
- Monday – Friday8am–6pm (Fri until 5pm)
- SaturdayClosed
- SundayClosed
Contact
Ready to Book Your Test?
No GP referral needed. Book online and get tested at our City of London clinic. Results within 1 day".
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Providing exceptional dental and medical care to the City of London community — 2 minutes from St Paul's station.
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 St Paul's Medical & Dental, we are registered with the Care Quality Commission (CQC) as Medical and Dental Limited (Provider ID: 1-29171948282), and our clinicians are registered with the relevant UK regulatory bodies, including the GDC and GMC. Our dentists, dental nurses and medical professionals deliver care that meets the highest clinical, safety and ethical standards, because our patients deserve nothing less.
Visit us at St Paul's
Private blood tests beside St Paul’s Cathedral — 2 minutes from St Paul’s tube and a short walk from Bank, Blackfriars and Barbican. Early appointments from 8am.
5 Ave Maria Lane, The City of London, EC4M 7AQ
We Accept All Major Dental Insurances
Use your workplace or personal dental cover with us. We provide itemised receipts and completed claim forms for all major UK insurers — including AXA Health, Aviva, Bupa, Cigna, Vitality, Westfield Health, WPA, Unum, and Boots Dental Plan.
You pay for treatment at the clinic and claim reimbursement from your insurer. Cover levels vary by policy — check your plan details. All insurer names and trademarks belong to their respective owners.