M51.A – Other lumbar and lumbosacral annulus fibrosus disc defects
ICD-10-CM 2027 diagnosis code · Other dorsopathies
ICD-10-CM code
M51.A
- Code
M51.A(claims format:M51A)- Description
- Other lumbar and lumbosacral annulus fibrosus disc defects
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M50-M54 Other dorsopathies
- Parent codes
- M51
Billable codes under M51.A
M51.A is a header code and cannot be used on claims. Choose the most specific code:
- M51.A0 – Intervertebral annulus fibrosus defect, lumbar region, unspecified sizeBillable
- M51.A1 – Intervertebral annulus fibrosus defect, small, lumbar regionBillable
- M51.A2 – Intervertebral annulus fibrosus defect, large, lumbar regionBillable
- M51.A3 – Intervertebral annulus fibrosus defect, lumbosacral region, unspecified sizeBillable
- M51.A4 – Intervertebral annulus fibrosus defect, small, lumbosacral regionBillable
- M51.A5 – Intervertebral annulus fibrosus defect, large, lumbosacral regionBillable
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M51 – Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders
Excludes2 (not included here):
Block M50-M54
Excludes1 (not coded here):
- current injury - see injury of spine by body region
- discitis NOS (M46.4-)
Related codes in M51
- M51.0 – Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with myelopathyHeader
- M51.1 – Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with radiculopathyHeader
- M51.2 – Other thoracic, thoracolumbar and lumbosacral intervertebral disc displacementHeader
- M51.3 – Other thoracic, thoracolumbar and lumbosacral intervertebral disc degenerationHeader
- M51.4 – Schmorl's nodesHeader
- M51.8 – Other thoracic, thoracolumbar and lumbosacral intervertebral disc disordersHeader
- M51.9 – Unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorderBillable
Frequently asked questions
What is ICD-10 code M51.A?
M51.A is the ICD-10-CM code for other lumbar and lumbosacral annulus fibrosus disc defects, in the block M50-M54 (Other dorsopathies).
Is M51.A a billable code?
No. M51.A is a header code with more specific child codes; report one of the billable codes listed above.
What category does M51.A belong to?
It belongs to category M51 – Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.