Based on creatinine 128μmol/L alone, it is not possible to determine the stage of chronic kidney disease. Stages of chronic kidney disease are usually judged based on glomerular filtration rate, and creatinine 128 μmol/L is usually considered to be in stage 2-3 of chronic kidney disease. Creatinine is the metabolic end product of creatine in muscle tissue. Creatinine does not bind with protein in the blood and can freely pass through the glomerulus, which is the most commonly used indicator to indirectly reflect the glomerular filtration function. When the glomerular filtration function is impaired, the body’s serum creatinine may be elevated, suggesting the presence of renal insufficiency. Normal values for creatinine range from 44 to 97 μmol/L for women and 53 to 106 μmol/L for men, with a creatinine level of 128 μmol/L suggesting impaired renal function. Clinically, laboratory data such as urea and creatinine are commonly used, combined with information such as patient’s gender, age and ethnicity to derive glomerular filtration rate by various formulas, so as to stage chronic kidney disease. Therefore, based on creatinine 128μmol/L alone, it is not possible to determine the stage of chronic kidney disease, and it is usually considered to be in stage 2~3 of chronic kidney disease. Further kidney function related tests are needed. If you find elevated creatinine level, it is recommended to go to regular hospitals in time, improve the examination to identify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.