M51.A4 Intervertebral annulus fibrosus defect, small, lumbosacral region
ICD-10-CM · CMS code reference
Official ICD-10-CM description: Intervertebral annulus fibrosus defect, small, lumbosacral region
Coding notes
From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.
Excludes1
Not coded together with this code. The exception is when the two conditions are unrelated to each other.
- current injury - see injury of spine by body region
- discitis NOS (M46.4-)
Excludes2
Not part of this code, but both can be coded when both are documented.
- cervical and cervicothoracic disc disorders (M50.-)
- sacral and sacrococcygeal disorders (M53.3)
Code first
Code the underlying condition first, then this code.
Related codes
M51.86Other intervertebral disc disorders, lumbar region ICD-10-CMM51.87Other intervertebral disc disorders, lumbosacral region ICD-10-CMM51.9Unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorder ICD-10-CMM51.A0Intervertebral annulus fibrosus defect, lumbar region, unspecified size ICD-10-CMM51.A1Intervertebral annulus fibrosus defect, small, lumbar region ICD-10-CMM51.A2Intervertebral annulus fibrosus defect, large, lumbar region ICD-10-CMM51.A3Intervertebral annulus fibrosus defect, lumbosacral region, unspecified size ICD-10-CMM51.A5Intervertebral annulus fibrosus defect, large, lumbosacral region ICD-10-CM
Common questions
Is M51.A4 a billable code?
Yes. M51.A4 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.