Connective tissue stenosis of neural canal
Connective tissue stenosis of neural canal
M99.4 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
M99.40 identifies connective tissue stenosis of the neural canal localized to the head region — a biomechanical lesion where fibrous or connective tissue narrows the spinal/neural canal at the craniovertebral or head level.
M99.41 identifies narrowing of the cervical spinal canal caused by connective tissue (e.g., fibrosis, ligamentous hypertrophy, or scar tissue) rather than by bone, disc material, or subluxation.
Narrowing of the thoracic spinal neural canal caused by connective tissue proliferation or fibrosis, classified as a biomechanical lesion under M99.
M99.43 identifies connective tissue stenosis of the neural canal specifically in the lumbar region — a biomechanical lesion in which fibrous or connective tissue encroaches on the lumbar spinal canal, reducing neural space.
Narrowing of the sacral neural canal caused by abnormal connective tissue — fibrosis, ligamentous hypertrophy, or other non-osseous soft-tissue changes — that encroaches on neural structures at the sacral level.
Narrowing of the neural canal in the pelvic region caused by abnormal connective tissue, classified as a biomechanical lesion under the M99 category.
M99.46 identifies connective tissue stenosis of the neural canal localized to the lower extremity — a biomechanical lesion in which fibrotic or thickened connective tissue narrows the bony canal through which neural structures pass in the lower limb region.
M99.47 identifies narrowing of the neural canal in the upper extremity caused by connective tissue pathology, classified under biomechanical lesions not elsewhere classified.
Narrowing of the neural canal in the rib cage region caused by connective tissue changes, classified as a biomechanical lesion not elsewhere classified.
Connective tissue stenosis of the neural canal affecting the abdominal region or other anatomical regions not captured by more specific M99.4x subcodes — a biomechanical lesion classification used primarily in chiropractic and osteopathic coding contexts.