Postdysenteric arthropathy, vertebrae

This code signifies an inflammatory joint condition affecting the vertebrae that develops as a reactive process following a gastrointestinal infection, typically dysentery. It is a form of reactive arthritis where the immune system mistakenly attacks the body's own tissues after an infection, leading to spinal inflammation.

Apply this code when documentation clearly indicates inflammation of the vertebral joints (spondylitis) as a sequela of a recent or past dysenteric infection. This diagnosis requires a confirmed history of dysentery preceding the onset of arthritic symptoms in the spine.

• Ensure documentation specifies involvement of the vertebrae; other joint involvement would require a different code.
• Confirm the causal link to a dysenteric infection; if the antecedent infection is not dysentery, a different reactive arthropathy code may be more appropriate.
• Sequence this code as the primary diagnosis if it is the reason for the encounter, or as a secondary diagnosis if it is a co-morbidity being managed.