Hyperlipoproteinemia Type IIa is characterized by elevated LDL but normal triglycerides and is due to a deficiency of the LDL receptor, a defect of the receptor or a modified LDL-apolipoprotein B-100, caused by mutation in the LDL receptor (LDLR) gene on chromosome 19p. Below you may find medications used to treat or help with Hyperlipoproteinemia Type IIa, Elevated LDL. More about Hyperlipoproteinemia Type IIa, Elevated LDL