M51.9 – Unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorder
ICD-10-CM 2027 diagnosis code · Other dorsopathies
ICD-10-CM code
M51.9
- Code
M51.9(claims format:M519)- Description
- Unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorder
- Short description
- Unsp thoracic, thoracolum and lumbosacr intvrt disc disorder
- Billable
- Yes – valid for HIPAA-covered transactions
- 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
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-)
Index terms for M51.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
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.A – Other lumbar and lumbosacral annulus fibrosus disc defectsHeader
Frequently asked questions
What is ICD-10 code M51.9?
M51.9 is the ICD-10-CM code for unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorder, in the block M50-M54 (Other dorsopathies).
Is M51.9 a billable code?
Yes. M51.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does M51.9 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.