My doctor is either a cardiologist or a pulmonologist. Why do I need to see a pulmonary hypertension specialist?

They are the proper specialists. However some of these specialists have very little training or experience in treating patients with pulmonary hypertension because it is an uncommon disease. If a heart or lung specialist has little experience in treating this disease, it is often helpful to have the patient consult with an experienced specialist. The pulmonary hypertension specialist can communicate with the local specialist to insure that the patient receives the best possible care.

Source: www.phassociation.org