Although all NBS programs in the US currently screen for the most common forms of SCD (HbSS, Hb SC, and Hb S/β thalassemia), there is wide variability across states with respect to screening, reporting, and referral of other hemoglobinopathies identified in the course of screening for the core panel conditions. Here, GSTM1 is linked to Schnyder corneal dystrophy.