Kidney Function Test in Singapore

What Is a Kidney Function Test?

Your kidneys filter roughly 180 litres of blood a day, removing waste and excess fluid while holding on to what your body needs. A kidney function test — the panel your report may label a renal profile, renal function test or RFT — checks how well that filtering is working. It is a group of measurements taken from one blood draw, and, in the fuller panels, a urine sample as well.

The reason it matters in Singapore is scale. According to the National Kidney Foundation Singapore, more than 500,000 people here have kidney disease, about six new patients are diagnosed with kidney failure every day, and Singapore ranks 3rd in the world for diabetes-induced kidney failure and 5th for the incidence of kidney failure overall. Around 2 in 3 new cases are caused by diabetes.

What makes kidney disease difficult is that it is quiet. The kidneys have substantial functional reserve, so kidney function can decline significantly before symptoms appear. Most people with early chronic kidney disease have no symptoms whatsoever — no pain, no change in how they pass urine, nothing they would take to a doctor. By the time symptoms are obvious, a substantial amount of function has usually been lost, and lost permanently. This is why kidney disease is normally found through a blood and urine test rather than because someone felt unwell.

Why Early Detection Changes the Outcome

Kidney damage that has already scarred does not grow back, but the speed of decline is very much modifiable. Picking up reduced filtering or a small leak of protein into the urine early gives your doctor years of runway to control blood pressure, manage blood sugar, review medications that strain the kidneys, and reduce protein loss — the measures that slow progression. It also matters for your heart: reduced kidney function and albumin in the urine are independent markers of cardiovascular risk, which is why a kidney result often changes how aggressively blood pressure and cholesterol are treated, and sometimes prompts a referral to a cardiologist for further assessment.

Who Should Have a Kidney Function Test?

Singapore's Agency for Care Effectiveness clinical guidance on chronic kidney disease asks primary care doctors to check kidney function in people carrying risk factors, rather than screening everyone. You are in that group if any of the following apply:

• Diabetes — the leading cause of kidney failure in Singapore. Anyone with diabetes should have kidney function and urine albumin checked at least yearly, alongside their HbA1c test.
• High blood pressure — the second major cause. Raised pressure damages the small vessels in the kidney's filters, and damaged kidneys in turn push blood pressure higher. See our page on hypertension management.
• Cardiovascular disease — heart disease and kidney disease share the same underlying vascular damage and frequently travel together.
• Family history of kidney disease — including inherited conditions such as polycystic kidney disease.
• Age 65 and above — filtering capacity declines gradually with age, so a baseline becomes more useful.
• Obesity — excess weight raises the workload on the kidneys and drives the diabetes and blood pressure that damage them; see our approach to medical weight loss.
• Long-term use of medications that strain the kidneys — regular non-steroidal anti-inflammatory painkillers, some traditional or herbal preparations, and certain long-term prescriptions.
• A previous episode of acute kidney injury — a past sudden drop in kidney function raises the long-term risk, even after apparent recovery.
• Smoking — an independent risk factor for kidney disease progression, in addition to its vascular effects.

If none of these apply and you simply want a baseline, a renal profile is included in most of our broader health screening packages, which is usually the more economical route. It is also commonly checked alongside liver function, since both organs are assessed together in a general screen.

Understanding Your Kidney Function Test Results

Singapore laboratories report creatinine in micromoles per litre (µmol/L) and eGFR in mL/min/1.73m². A commonly used adult reference range for creatinine is roughly 45 to 100 µmol/L for men and 40 to 80 µmol/L for women — but reference intervals vary meaningfully between laboratories and assay methods, so always read the range printed on your own report rather than a general figure.

Men usually sit higher than women because creatinine comes from muscle. That also means a very muscular person can sit at or above the top of the range with entirely healthy kidneys, while an older or frail person can have a reassuring-looking creatinine despite genuinely reduced function. This is exactly why eGFR — which adjusts for age and sex — is the figure used for staging.

What your eGFR means

An important qualifier: chronic kidney disease is diagnosed when an abnormality is present for at least three months. A single low eGFR is not a diagnosis — it is repeated, typically about three months later, to establish whether the change is persistent or was a one-off caused by dehydration, illness or a medication.

What your urine albumin (ACR) means

The albumin-to-creatinine ratio is reported in mg/mmol in Singapore (and sometimes mg/g internationally). It is the marker that picks up kidney damage earliest.

One point is worth being precise about: an ACR of 3 mg/mmol or above (30 mg/g or above) defines the A2 category — it is not, by itself, a diagnosis of chronic kidney disease. CKD is diagnosed when there is evidence of kidney damage or reduced eGFR persisting for at least three months, and it can be diagnosed at any albuminuria category. Like eGFR, a raised ACR must be persistent to count: a one-off reading can follow fever, a urinary infection, heavy exercise or menstruation, so it is repeated before conclusions are drawn.

Creatinine, eGFR and urea — what is the difference?

These three are often confused because they appear on the same report:

• Creatinine is the raw measurement — useful, but influenced by muscle mass, so hard to interpret alone.
• eGFR is a calculation derived from that creatinine, adjusted for age and sex. It is the figure used to stage kidney function and track change over time.
• Urea (BUN) reflects protein waste and is more sensitive to dehydration, diet and gut bleeding, making it a less specific kidney marker on its own. The ratio of urea to creatinine can, however, help your doctor work out why a result is abnormal.

Your doctor reads all of them together, with your urine ACR and — where available — your previous results. A trend over time tells you far more than a single snapshot.

Kidney Function Test Price in Singapore

The renal profiles below run from a basic filtering-and-electrolytes panel to a full assessment including urine albumin and the markers affected by longer-standing kidney disease. A renal profile is also already included in most of our broader health screening packages, which is often the more economical route if you want a fuller picture.

^* Prices are NETT and inclusive of GST. Kidney function tests done for chronic disease management under the CDMP may have MediSave or subsidy eligibility for eligible Singapore Citizens and Permanent Residents — check with our team before your visit. An ultrasound of the kidneys is arranged where your result or symptoms point to a structural cause such as stones, cysts or obstruction — it is a separate imaging scan, not part of a renal profile.

Last updated: Aug 01, 2026. While every effort is made to keep pricing information up to date, please WhatsApp 8095 3275 to confirm the latest rates.

Can Kidney Function Be Improved?

This is the question most people ask once a result comes back low, and the answer depends on the cause.

A sudden drop — from dehydration, a severe infection, an obstruction or a medication — is usually an acute kidney injury, and function often recovers substantially once the cause is identified and treated. Chronic kidney disease is different: damage built up over years leaves scarring, and nephrons that have scarred do not regenerate. In that sense, established chronic kidney disease is not reversible.

What is very much modifiable is the rate of decline, and that is where the real gains are. Many people diagnosed early never progress to needing dialysis. The measures with good evidence behind them:

• Control blood pressure — one of the most effective interventions for slowing progression. Certain classes of blood pressure medication also directly reduce protein leak, and your doctor will advise which is suitable for you.
• Manage blood sugar — given that around two-thirds of kidney failure in Singapore stems from diabetes, keeping blood sugar in range is central. Some diabetes medication classes have been shown to slow kidney decline independently of their sugar-lowering effect.
• Reduce albumin in the urine — lowering protein leak is itself associated with slower progression, not just a marker of it.
• Stop smoking — smoking accelerates the loss of kidney function as well as damaging blood vessels generally.
• Lose excess weight and stay active — both reduce the workload on the kidneys and improve the blood pressure and blood sugar that drive damage.
• Be careful with painkillers — regular long-term use of non-steroidal anti-inflammatory medications is a common and avoidable contributor to kidney damage.
• Review medications and supplements — some prescriptions need dose adjustment as eGFR falls, and certain traditional or herbal preparations can be harmful to the kidneys. Bring the full list to your consultation.
• Moderate salt, and take dietary advice rather than guesswork — reducing salt helps blood pressure. Protein and potassium restrictions are sometimes appropriate but should be individualised, not self-imposed — unnecessary restriction causes its own harm.

No supplement, tea or detox regimen has been shown to restore lost kidney function, and some carry real risk. The evidence-based path is the unglamorous one: treat the causes, monitor the trend, and adjust early.