Kidney disease is often called a silent condition — significant function can be lost before symptoms appear. Kidney health assessment in China for foreigners is straightforward and inexpensive, yet many expats have never had their renal function tested. With China’s high rates of hypertension and diabetes, and dietary factors that can stress the kidneys, baseline screening is a sensible precaution.
Core Kidney Screening Tests
Serum Creatinine and eGFR
Creatinine is a waste product filtered by the kidneys. The estimated glomerular filtration rate (eGFR) is calculated from creatinine, age, sex, and sometimes ethnicity, and indicates what percentage of normal kidney function remains. An eGFR above 90 is normal; below 60 for three months indicates chronic kidney disease. This basic test costs ¥30–100 and is included in most health screening packages.
Urinalysis
Urine testing detects protein, blood, glucose, and signs of infection. Proteinuria (protein in urine) is often the earliest sign of kidney damage and can appear before eGFR declines. The urine albumin-to-creatinine ratio (UACR) is a more sensitive test for early diabetic kidney disease. Cost: ¥30–100 for basic urinalysis, ¥50–150 for UACR.
Renal Ultrasound
Ultrasound assesses kidney size, structure, and detects cysts, stones, obstruction, or masses. It is non-invasive and costs ¥100–300. Polycystic kidney disease and other structural abnormalities are often discovered incidentally on abdominal ultrasound performed for other reasons.
Additional Markers
For a more complete assessment, cystatin C provides an alternative estimate of GFR that is less affected by muscle mass than creatinine. Electrolytes (sodium, potassium, calcium, phosphate) and uric acid complete the picture. Blood pressure measurement is essential — hypertension both causes and results from kidney disease.
Who Should Be Screened
- Anyone with diabetes or hypertension — annual screening is standard
- Those with a family history of kidney disease
- People over 60
- Anyone with abnormal urinalysis or elevated creatinine on previous testing
- Those taking medications that affect kidney function (NSAIDs, some antibiotics, certain supplements)
- Anyone with symptoms: swelling, fatigue, changes in urination, foamy urine
Costs at a Glance
| Test | Typical Cost (RMB) |
|---|---|
| Serum creatinine + eGFR | 30 – 100 |
| Urinalysis | 30 – 100 |
| Urine albumin-creatinine ratio | 50 – 150 |
| Renal ultrasound | 100 – 300 |
| Cystatin C | 100 – 300 |
| Comprehensive renal panel | 200 – 500 |
Understanding Your Results
eGFR categories follow the international KDIGO classification: G1 (≥90) is normal, G2 (60–89) is mildly reduced, G3a (45–59) and G3b (30–44) indicate moderate disease, G4 (15–29) is severe, and G5 (<15) is kidney failure. A single abnormal result should be repeated — dehydration, recent exercise, and high protein intake can temporarily elevate creatinine. Persistent abnormalities require nephrology referral.
Practical Considerations
Fasting is not required for kidney blood tests, but avoid heavy protein meals the day before. Stay normally hydrated — both dehydration and overhydration can affect results. If you have diabetes or hypertension, annual kidney screening should be part of your routine care. For those with known kidney disease, China offers excellent nephrology care at top centers like Ruijin Hospital in Shanghai and Peking University First Hospital in Beijing.
Kidney health assessment is simple, inexpensive, and potentially life-changing. A basic panel costs less than a restaurant meal and can catch disease while it is still manageable.