Our family Doctor is an O.D. as opposed to M.D. and he does manipulations the same as a chiropractor. I have never needed it done, but my wife has it done occasionally for neck pain. Years ago, a surgeon told her she had bone spurs in her vertebra and would need to have her neck fused and she would just have to live with the pain until then.
The OD looked at the x-rays and said nonsense. He put her on the table and manipulated her neck and the pain was gone immediately. It lasted for a few years until she needed manipulated again.
It works.
O.D.= Optometrist
D.O.= Oestopath