My father recently received a diagnosis of stage 3B Chronic Kidney Disease (CKD). Notably, his creatinine levels were normal just 1.5 years ago, despite having high blood glucose levels at the time. Although his glucose levels have been well-managed with medication since then, his serum creatinine has risen to 1.9, with a corresponding GFR of 38. Is it possible to stabilize his creatinine levels and halt further progression of the disease?