ICD-10-CM 2027
ICD-10 code for Annular fibrosis tear
From the official ICD-10-CM alphabetic index entry “Tear, torn (traumatic) › annular fibrosis”. Page updated September 29, 2026.
About coding Annular fibrosis tear
The ICD-10-CM code for Annular fibrosis tear is M51.35 (Other intervertebral disc degeneration, thoracolumbar region).
Within M51.3 (other thoracic, thoracolumbar and lumbosacral intervertebral disc degeneration), M51.35 is specifically for other intervertebral disc degeneration, thoracolumbar region. Related codes cover thoracic region (M51.34), lumbar region (M51.36) and lumbosacral region (M51.37).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 551 (Medical Back Problems with MCC, relative weight 1.6358) and DRG 552 (Medical Back Problems without MCC, relative weight 0.9584), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Annular fibrosis tear ICD-10 codes
What is the ICD-10 code for Annular fibrosis tear?
- M51.35 — Other intervertebral disc degeneration, thoracolumbar region.
Is M51.35 billable?
- Yes. M51.35 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M51.35 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M51.35 as a principal diagnosis.
Is M51.35 a CC or MCC?
- No. M51.35 is neither a CC nor an MCC under MS-DRG v44.0.