My parathyroid level is 134, is this dangerous?

Depends.: Depends upon why your PTH is elevated. This could be a normal response to a variety of metabolic and hormonal conditions. Too complicated to explain here. You should talk with the doc who measured this.

Depends on calcium: If the calcium is elevated or high normal and PTH is significantly elevated, primary hyperparathyroidism is most likely cause and would most likely be treated with surgery. If the calcium is low the most likely cause is vitamin d deficiency.

PTH dangerous.: NOT. Although it warrants more investigation. If the calcium is also high, you likely have primary Hyperparathyroidism which is a disease requiring surgery. If the calcium is normal or low, vitamin D Deficiency is the likely culprit.