M51.A
⚠ Non-billable (Header)Other lumbar and lumbosacral annulus fibrosus disc defects
Diseases of the musculoskeletal system and connective tissue (M00-M99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
⚠️ Excludes2
inherited from M51Rules from parent category M51: Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders
- • cervical and cervicothoracic disc disorders (M50.-)
- • sacral and sacrococcygeal disorders (M53.3)
Child Codes (6)
M51.A0Intervertebral annulus fibrosus defect, lumbar region, unspecified sizeM51.A1Intervertebral annulus fibrosus defect, small, lumbar regionM51.A2Intervertebral annulus fibrosus defect, large, lumbar regionM51.A3Intervertebral annulus fibrosus defect, lumbosacral region, unspecified sizeM51.A4Intervertebral annulus fibrosus defect, small, lumbosacral regionM51.A5Intervertebral annulus fibrosus defect, large, lumbosacral region
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CodeM51.A
BillableNo — Header code
ParentM51
CategoryDiseases of the musculoskeletal system and connective tissue (M00-M99)
Excludes10 rule(s)
Excludes22 note(s)
Child codes6
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)