The only chiropractic service covered by Medicare is manual manipulation of the spine to correct subluxation. Subluxation of the spine is when one or more of the bones of your spine move out of position. This is covered by Medicare Part B (medical insurance) in instances where it is medically necessary and provided by a chiropractor or other qualified provider. You do not need an X-ray to prove you have a subluxation of the spine.
One way you may be able to get additional Medicare chiropractic coverage is through a Medicare Advantage (MA) plan. Some Medicare Advantage plans could provide additional chiropractic coverage benefits. Check with your Medicare Advantage plan directly to see what chiropractic services are covered. You still need to continue paying your monthly Part B premium along with any premium the plan might charge.