High hcg concerns?

Miranda

Hey all- I’ve had a couple ultrasounds that show a single pregnancy but I just had my first trimester blood test done as part of the screening for DS and my HCG at 10 weeks 5 days was like 235000. The chart my doctors office has stated I should be 100000 or lower at 10 weeks but online it looks like 288000 and lower is normal. I read that high hcg can be a marker for DS- anyone know what is actually considered a high number?