What type of doctor can order a spinal fluid analysis?

Depends: Any doctor involved with medical treatment and workup involving the spine and brain. Often neurologists and er physicians do this to rule out spinal meningitis or nonemergently for working up possible neurologic disease like ms.

MDs/DOs: Virtually all mds/dos can order this test, but not all can do it. Typically is done by a neurologist, surgeons/medical residents...

Multiple: The ordering doctor is usually er, internal med/peds, oncology, neurology or neurosurgery for workups. Depending on institution, all of them may perform the procedure, with anesthesia or interventional radiology called for challenging cases. Anesthesiologists do the same procedure frequently for spinal anesthetics.