@martha26

Maybe the hematologist is because the primary care doctor is considering the possibility of an abnormal blood clot mechanism. There might be something in the bloodwork or the medicine you are taking for other reasons that may indicate this? I am not a medical professional, but I might ask the question.

In my case, the vascular surgeon was called in because the blood clot had already migrated from my leg to my lung and someone thought that if it kept moving, they would try to remove it by some surgical procedure, which the vascular surgeon described but I was too panicky to remember now.