A Study Of Mircera In Patients With Kidney Disease Who Are Not On Dialysis

Inclusion Criteria: * Patients with stage II-IV CKD not on dialysis, including renal transplant patients, who are receiving erythropoiesis-stimulating agent (ESA) treatment or are ESA-naive * Patients who will not require dialysis within 12 months after the start of Mircera therapy * Patients whose life expectancy is greater than 12 months after Mircera initiation * Patients \>/= 18 years and \</= 75 years of age * Patients who are female and of childbearing potential must be using effective contraception methods * Patients with no contra-indications to ESA treatment (for example, hypersensitivity, non-controlled hypertension and others according to the local SmPC) * Patients who have given written informed consent where local regulations allow or require it Exclusion Criteria: * Patients with stage I-II or stage V CKD * Poorly controlled hypertension * Active malignant disease