M51.26: Other intervertebral disc displacement, lumbar region
Region: Lumbar
By Dr. Daniel Turner, DC · Reviewed September 2, 2026
What does M51.26 mean?
M51.26 is the ICD-10-CM code for intervertebral disc displacement in the lumbar region: a documented disc bulge, protrusion, or herniation without the code asserting myelopathy or radiculopathy.
Searched as lumbar disc herniation ICD 10, lumbar disc bulge diagnosis code, and herniated disc L4 L5 code.
When does a chiropractor use M51.26?
The code the MRI report earns. Disc displacement is an imaging diagnosis, and when the report is in the chart this code turns a symptom claim into an anatomy claim. If the disc is producing radicular findings, M51.16 captures displacement plus radiculopathy together and is the better code; M51.26 is for the disc lesion whose neurologic exam is clean.
Coding rules that matter
- ✓M51.26 covers the lumbar region; M51.27 is lumbosacral
- ✓With radiculopathy, use M51.16 or M51.17 instead and drop the separate radiculopathy code
- ✓Requires imaging in the record; coding a disc from symptoms alone is indefensible in review
The codes around M51.26
| Code | Description |
|---|---|
| M51.24 | Other intervertebral disc displacement, thoracic |
| M51.25 | Other intervertebral disc displacement, thoracolumbar |
| M51.26 | Other intervertebral disc displacement, lumbar (this code) |
| M51.27 | Other intervertebral disc displacement, lumbosacral |
| M51.16 | Lumbar disc disorder with radiculopathy |
| M51.36 | Other intervertebral disc degeneration, lumbar |
When M51.26 is the wrong code
Not from symptoms alone; a disc code without imaging in the chart is an assertion a reviewer can simply refuse. Not with a separate radiculopathy code when the combination code M51.16 exists. Degeneration without displacement is M51.36, and the MRI report wording decides which.
How does M51.26 work on Medicare chiropractic claims?
Secondary behind M99.03. A documented structural lesion supports active care necessity strongly and also frames the referral conversation if conservative care plateaus.
Where claims go wrong
Coding disc displacement without imaging; double coding M51.26 plus M54.16 when the combination code exists; carrying the disc code on claims for regions the disc does not involve.
How Cervica helps with M51.26
Cervica validates diagnosis pointers line by line before a claim goes out, checks the Medicare subluxation pairing and region agreement automatically, and carries diagnoses forward from the SOAP note so the claim always matches what the documentation actually says.
Related codes
Quick answers
What does M51.26 mean?
M51.26 is the ICD-10-CM code for intervertebral disc displacement in the lumbar region: a documented disc bulge, protrusion, or herniation without the code asserting myelopathy or radiculopathy.
When does a chiropractor use M51.26?
The code the MRI report earns. Disc displacement is an imaging diagnosis, and when the report is in the chart this code turns a symptom claim into an anatomy claim. If the disc is producing radicular findings, M51.16 captures displacement plus radiculopathy together and is the better code; M51.26 is for the disc lesion whose neurologic exam is clean.
How does M51.26 work on Medicare chiropractic claims?
Secondary behind M99.03. A documented structural lesion supports active care necessity strongly and also frames the referral conversation if conservative care plateaus.
General information for billing teams, not medical, legal, or coding advice for any individual claim. ICD-10-CM is maintained by CMS and the National Center for Health Statistics; the official code set and guidelines control. Payer policies vary.