The cost of testing for ankylosing spondylitis varies significantly from high to low, depending on the needs of the different stages of the disease. The approximate cost for the diagnostic phase is around $1,000 to $3,500 and the follow-up phase is around $300 to $1,500. In the diagnostic stage of ankylosing spondylitis, various aspects of tests such as sacroiliac + hip MRI, blood tests, liver and kidney function tests, inflammation indicators, immune antibodies, immunoglobulin tests, etc. are required, and the cost ranges from 1,000 to 3,500. In the follow-up phase of ankylosing spondylitis, regular review of pelvic + spinal X-rays, regular review of blood tests, liver and kidney function tests, inflammatory indicators, and other aspects of the examination, the cost ranges from 300 to 1500. Different patients with different conditions need different tests, the cost will also change, and can not be generalized. If ankylosing spondylitis is suspected, it is recommended to go to the hospital in time for early treatment.