Clarifying the Clinical Utility of NTAR/RGR for PAH and CTEPH. Comment on Iancu et al. Evaluating NT-proBNP-to-Albumin (NTAR) and RDW-to-eGFR (RGR) Ratios as Biomarkers for Predicting Hospitalization Duration and Mortality in Pulmonary Arterial Hypertension (PAH) and Chronic Thromboembolic Pulmonary Hypertension (CTEPH). Diagnostics 2025, 15, 2126. The gene discussed is ALB; the disease is chronic thromboembolic pulmonary hypertension.