Where could I have a triple fusion cervical surgery done in the us?

Most hospitals. Most board certified orthopaedic spine surgeons or neurosurgeons can perform this operation.
Anywhere. Anywhere where there are spine surgeons. You can easily locate spine surgeons near you by doing a internet search or better yet, speaking to your family dr. Good luck. Check out spine-health.Com.
Many places. Most medium size and large cities have spinal specialists that can either perform the surgery (if it is necessary) or help find someone who can. Also communities with medical schools can provide this service. If in doubt, get a second opinion.