M51.A1Billable
Intervertebral annulus fibrosus defect, small, lumbar region
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue
- Category
- M51
- Effective date
- October 1, 2026
Related codes in category M51
M51Thoracic, thoracolum, and lumbosacral intvrt disc disordersM51.0Thoracic, thrclm and lumbosacr intvrt disc disord w myelpathM51.04Intervertebral disc disorders w myelopathy, thoracic regionYesM51.05Intvrt disc disorders w myelopathy, thoracolumbar regionYesM51.06Intervertebral disc disorders with myelopathy, lumbar regionYesM51.1Thor, thrclm & lumbosacr intvrt disc disord w radiculopathyM51.14Intvrt disc disorders w radiculopathy, thoracic regionYesM51.15Intvrt disc disorders w radiculopathy, thoracolumbar regionYesM51.16Intervertebral disc disorders w radiculopathy, lumbar regionYesM51.17Intvrt disc disorders w radiculopathy, lumbosacral regionYesM51.2Oth thoracic, thrclm and lumbosacr intvrt disc displacmntM51.24Other intervertebral disc displacement, thoracic regionYes
Frequently asked questions
What is ICD-10 code M51.A1?
M51.A1 is an ICD-10-CM diagnosis code for Intervertebral annulus fibrosus defect, small, lumbar region.
Is M51.A1 a billable code?
Yes. M51.A1 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is M51.A1 in?
M51.A1 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M51.A1 become effective?
M51.A1 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M51.A1?
M51.A1 belongs to category M51, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.