Conversion: mg/dL = µmol/L ÷ 17.1 (bilirubin MW 584.66 g/mol). Thresholds digitized from Pillai A, Pandita A, Osiovich H, Manhas D. Pathogenesis and Management of Indirect Hyperbilirubinemia in Preterm Neonates Less Than 35 Weeks: Moving Toward a Standardized Approach. NeoReviews. Clinical judgment and local protocol always override; verify against the original figures before acting.