Coding fusion of spine M43.2_ with ankylosing spondylitis M45.0_


My patient had thoracic and lumbar spinal fusions for osteomyelitis years ago. Patient has recently been diagnosed with ankylosing spondylitis. I thought we couldn't code these two together? Can we code patient with ankylosing spondylitis in a different spinal region than they have fusion in?

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