I recommend Dr Trask at Houston Methodist who did a successful back surgery on the wife a few years ago at Houston Methodist.
The whole department is good.
Ask your doctor to refer to Dr. Trask.
https://www.houstonmethodist.org/for-health-professionals/department-programs/neurosurgery/faculty/
It is a spinal issue at the base of the skull, not a back issue.
Yes, I was thinking probably the Houston Methodist or UT Southwestern in Dallas.