ICD-10-CM
ICD-10 code for Defect, defective intervertebral annular fibrosis: M51.9
The ICD-10-CM index points "Defect, defective intervertebral annular fibrosis" to M51.9, Unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorder. M51.9 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
More specific codes in M51
A header groups codes and is not billed. A billable code is one you can report.
- M51Thoracic, thoracolumbar, and lumbosacral intervertebral disc disordersHeader
- M51.0Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with myelopathyHeader
- M51.04Intervertebral disc disorders with myelopathy, thoracic regionBillable
- M51.05Intervertebral disc disorders with myelopathy, thoracolumbar regionBillable
- M51.06Intervertebral disc disorders with myelopathy, lumbar regionBillable
- M51.1Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with radiculopathyHeader
- M51.14Intervertebral disc disorders with radiculopathy, thoracic regionBillable
- M51.15Intervertebral disc disorders with radiculopathy, thoracolumbar regionBillable
- M51.16Intervertebral disc disorders with radiculopathy, lumbar regionBillable
- M51.17Intervertebral disc disorders with radiculopathy, lumbosacral regionBillable
- M51.2Other thoracic, thoracolumbar and lumbosacral intervertebral disc displacementHeader
- M51.24Other intervertebral disc displacement, thoracic regionBillable
- M51.25Other intervertebral disc displacement, thoracolumbar regionBillable
- M51.26Other intervertebral disc displacement, lumbar regionBillable
- M51.27Other intervertebral disc displacement, lumbosacral regionBillable
- M51.3Other thoracic, thoracolumbar and lumbosacral intervertebral disc degenerationHeader
- M51.34Other intervertebral disc degeneration, thoracic regionBillable
- M51.35Other intervertebral disc degeneration, thoracolumbar regionBillable
- M51.36Other intervertebral disc degeneration, lumbar regionHeader
- M51.360Other intervertebral disc degeneration, lumbar region with discogenic back pain onlyBillable
- M51.361Other intervertebral disc degeneration, lumbar region with lower extremity pain onlyBillable
- M51.362Other intervertebral disc degeneration, lumbar region with discogenic back pain and lower extremity painBillable
- M51.369Other intervertebral disc degeneration, lumbar region without mention of lumbar back pain or lower extremity painBillable
- M51.37Other intervertebral disc degeneration, lumbosacral regionHeader
- M51.370Other intervertebral disc degeneration, lumbosacral region with discogenic back pain onlyBillable
- M51.371Other intervertebral disc degeneration, lumbosacral region with lower extremity pain onlyBillable
- M51.372Other intervertebral disc degeneration, lumbosacral region with discogenic back pain and lower extremity painBillable
- M51.379Other intervertebral disc degeneration, lumbosacral region without mention of lumbar back pain or lower extremity painBillable
- M51.4Schmorl's nodesHeader
- M51.44Schmorl's nodes, thoracic regionBillable
- M51.45Schmorl's nodes, thoracolumbar regionBillable
- M51.46Schmorl's nodes, lumbar regionBillable
- M51.47Schmorl's nodes, lumbosacral regionBillable
- M51.8Other thoracic, thoracolumbar and lumbosacral intervertebral disc disordersHeader
- M51.84Other intervertebral disc disorders, thoracic regionBillable
- M51.85Other intervertebral disc disorders, thoracolumbar regionBillable
- M51.86Other intervertebral disc disorders, lumbar regionBillable
- M51.87Other intervertebral disc disorders, lumbosacral regionBillable
- M51.9Unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorderBillable
- M51.AOther lumbar and lumbosacral annulus fibrosus disc defectsHeader
- M51.A0Intervertebral annulus fibrosus defect, lumbar region, unspecified sizeBillable
- M51.A1Intervertebral annulus fibrosus defect, small, lumbar regionBillable
- M51.A2Intervertebral annulus fibrosus defect, large, lumbar regionBillable
- M51.A3Intervertebral annulus fibrosus defect, lumbosacral region, unspecified sizeBillable
- M51.A4Intervertebral annulus fibrosus defect, small, lumbosacral regionBillable
- M51.A5Intervertebral annulus fibrosus defect, large, lumbosacral regionBillable
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From M51. A note on a category applies to every code under it.
Related conditions
Related pages
- M51.9 code detailsNotes, nearby codes, CMS-HCC group
- Category M51Every code under it
- Chapter 13Diseases of the musculoskeletal system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Defect, defective intervertebral annular fibrosis?
The ICD-10-CM index points "Defect, defective intervertebral annular fibrosis" to M51.9, Unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorder. M51.9 is a billable code.
Is M51.9 billable?
Yes. M51.9 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to M51.9?
The CDC tabular list gives 2 Excludes2 notes (may be coded together when both are documented) for M51.9 and the categories above it. They are listed on this page.
What chapter is M51.9 in?
Chapter 13. Diseases of the musculoskeletal system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.