A diagnostic panel for Paroxysmal Nocturnal Hemoglobinuria (PNH) typically includes a complete blood count (CBC), reticulocyte count, serum lactate dehydrogenase (LDH) level, haptoglobin level, Coombs test, and most importantly, flow cytometry which is considered the gold standard for diagnosing PNH by identifying the characteristic deficiency of specific proteins on the surface of red blood cells due to a genetic mutation causing the disease;.