Abstract Background and Aims The prevalence of end-stage renal disease (ESRD) is on the rise in the Philippines, and the prognosis for ESRD worsens with the presence of diabetes mellitus. Although the neutrophil-to-lymphocyte ratio (NLR) is a dependable prognostic marker for mortality, its applicability as a prognostic biomarker in patients with diabetes and chronic kidney disease remains uncertain. This study seeks to establish the correlation between NLR and morbidity among Filipino patients with ESRD due to diabetic nephropathy undergoing maintenance hemodialysis. To determine the association between NLR and morbidity among Filipino patients on maintenance hemodialysis due to ESRD secondary to diabetic nephropathy. Method Among the 191 screened ESRD patients on maintenance hemodialysis, 71 were attributed to diabetic nephropathy, and only 63 met the inclusion criteria for the study. Clinicodemographic information, encompassing age, sex, height, weight, body mass index (BMI), medications, and comorbidities, was extracted from the medical records of these 63 eligible patients. Subsequently, the patients were categorized into two groups based on their baseline neutrophil-to-lymphocyte ratio (NLR) values, with a cutoff set at 3.5—forming the high NLR group (≥3.5) and the low NLR group (<3.5). This threshold was established considering data indicating that an NLR of ≥3.5 is associated with heightened inflammatory states, leading to increased morbidity. After a 6-month follow-up, data on the primary outcome measure, i.e., the occurrence of the disease, were collected. Results Out of the 63 patients assessed, the majority (n=39, 61.9%) had a baseline NLR value of <3.5, and only 2 individuals in this group developed a disease. The high NLR group comprised 24 (38.1%) patients, with 15 of them developing diseases. Among these cases, 4 (0.16%) had diabetic foot, 3 (0.125%) had pneumonia, 3 (0.125%) developed catheter-related bloodstream infections, and 2 (0.08%) had pulmonary edema. Additionally, 1 case each of coronary artery disease (0.04%), hypertensive emergency (0.04%), and calciphylaxis (0.04%) were observed. NLR demonstrated a significant association with clinical outcomes (p < 0.05). Conclusion In conclusion, there is a significant correlation between the neutrophil-to-lymphocyte ratio (NLR) and disease development in Filipino patients undergoing maintenance hemodialysis for ESRD attributed to diabetic nephropathy. Patients with a high baseline NLR exhibit an elevated inflammatory state and a greater susceptibility to developing disease conditions compared to those with an NLR<3.5. Therefore, a high baseline NLR can serve as a predictive indicator for prognosis within this specific population.