What type of doctor do you see for hyperparathyroidism?

See your normal doctor and they will refer you to an appropriate specialist.

More specifically, an endocrinologist is the specialist one would typically see to diagnose the disease after being referred by your primary care physician.

Unfortunately, often times PCP's and even Endocrinologists don't diagnose the disease properly. While a high calcium level is an indicator of hyperthyroidism in 99% of patients, a Sestamibi scan is often performed and often times read as negative because they are not performed that often and those performing and reading scan results don't do it properly.