M51.A0 – Intervertebral annulus fibrosus defect, lumbar region, unspecified size

ICD-10-CM 2027 diagnosis code · Other dorsopathies

Billable code

ICD-10-CM code M51.A0

Code: M51.A0 (claims format: M51A0)
Description: Intervertebral annulus fibrosus defect, lumbar region, unspecified size
Short description: Intvrt annulus fibrosus defect, lumbar region, unsp size
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 › M51.A

Notes for M51.A0

Code first:

, if applicable, lumbar disc herniation (M51.06, M51.16, M51.26)

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):

cervical and cervicothoracic disc disorders (M50.-)
sacral and sacrococcygeal disorders (M53.3)

Block M50-M54

Excludes1 (not coded here):

current injury - see injury of spine by body region
discitis NOS (M46.4-)

Index terms for M51.A0

Entries in the ICD-10-CM alphabetic index that lead to this code:

Defect, defective, intervertebral annular fibrosis, lumbar

Related codes in M51.A

Frequently asked questions

What is ICD-10 code M51.A0?

M51.A0 is the ICD-10-CM code for intervertebral annulus fibrosus defect, lumbar region, unspecified size, in the block M50-M54 (Other dorsopathies).

Is M51.A0 a billable code?

Yes. M51.A0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M51.A0 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.