Competent physicians are not insulted when patients ask for a second opinion. Nevertheless, be tactful. Remember that physicians are human too. Consultation is a time honored part of practicing medicine. It is valuable to have two medical professionals view the same condition and arrive at independent diagnostic impressions and evaluations of treatments.
Many insurance companies require a confirming opinion before some elective surgical procedures.
Sometimes Medicare and Medicaid also require a second opinion. Even if a second opinion confirms the original opinion, there is often added value. It may give you more confidence in the options available. Patients with more confidence are more likely to be more reconciled and compliant with treatments. And, importantly, with a second opinion, the final decision about treatment is now in your hands.