Intvrt annulus fibrosus defect, lumbar region, unsp size

This code describes a structural compromise of the annulus fibrosus, the tough outer ring of an intervertebral disc, specifically located in the lumbar spine. This defect signifies a tear or disruption in the annular fibers, allowing for potential herniation of the nucleus pulposus.

Use this code when documentation clearly indicates an annulus fibrosus defect in the lumbar region without specifying the size of the defect. This is often identified through imaging studies like MRI or during surgical exploration. It applies when the physician has diagnosed an annular tear but has not quantified its dimensions.

• Do not use if the size of the defect (e.g., small, large) is documented; instead, refer to more specific codes within the M51.A- category.
• Always sequence this code after the primary diagnosis if the annular defect is a secondary finding or complication of another condition.
• Ensure the documentation specifies "lumbar region" to support the use of this code, as defects can occur in other spinal regions.