How high that value is depends on the units of measurement. Two units are in common use, nmol/L and mg/dl. Based on that number, I'd guess it was in nmol/L? (If it's mg/dL it is a very high number.) Many guidelines say that Lp(a) concentrations of ≈125 nmol/L (≈50 mg/dL) or higher are considered elevated (“risk-enhancing”). Exactly what the implications are beyond that, I don't know. My number is 165-ish nmol/L. When they measured mine, they gave me a letter of explanation to send to immediate family on the chance they want to get checked. It's genetic. I looked around at participating in some trials, and my impression is that my number is a little low to participate in most studies on the effects of lp(a) lowering drugs on MACE. I guess that's good??? At any rate, good luck! Here a site that has some accessible information on lp(a) and familia hypercholesterolemia. https://familyheart.org