All ICD10 Codes

M51.1

Non-Billable
ChapterM00–M99
Ranksubcategory
Official Description

Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with radiculopathy

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).

Instructional Notes

Includes
  • Sciatica due to intervertebral disc disorder
Excludes1(Not coded here)
General instructions are available for the parent sections:
View CH13 NotesView M50-M54 NotesView M51 Notes

Clinical Hierarchy

CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)
M50-M54Other dorsopathies (M50-M54)
M51Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders
M51.1Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with radiculopathy
M51.14Intervertebral disc disorders with radiculopathy, thoracic region
M51.15Intervertebral disc disorders with radiculopathy, thoracolumbar region
M51.16Intervertebral disc disorders with radiculopathy, lumbar region
M51.17Intervertebral disc disorders with radiculopathy, lumbosacral region

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M51.1:

categoryM51
Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders
View context instructions
blockM50-M54
Other dorsopathies (M50-M54)
View context instructions
chapterCH13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to M51.1. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

18 raw paths
Degeneration, degenerative4 unique routes
intervertebral disc(4 variants)
lumbar region
with
neuritis, radiculitis, radiculopathy or sciatica→M51.1
lumbosacral region
with
neuritis, radiculitis, radiculopathy or sciatica→M51.1
thoracic region
with
neuritis, radiculitis, radiculopathy→M51.1
thoracolumbar region
with
neuritis, radiculitis, radiculopathy→M51.1
Disease, diseased4 unique routes
intervertebral disc(4 variants)
lumbar (with)
neuritis, radiculitis, radiculopathy or sciatica→M51.1
lumbosacral (with)
neuritis, radiculitis, radiculopathy or sciatica→M51.1
thoracic (with)
neuritis, radiculitis or radiculopathy→M51.1
thoracolumbar (with)
neuritis, radiculitis or radiculopathy→M51.1
Disorder (of)4 unique routes
disc (intervertebral)(4 variants)
with(4 variants)
radiculopathy(4 variants)
lumbar region→M51.1
lumbosacral region→M51.1
thoracic region→M51.1
thoracolumbar region→M51.1
Displacement, displaced4 unique routes
intervertebral disc NEC(4 variants)
lumbar region
with
neuritis, radiculitis, radiculopathy or sciatica→M51.1
lumbosacral region
with
neuritis, radiculitis, radiculopathy or sciatica→M51.1
thoracic region
with
neuritis, radiculitis, radiculopathy→M51.1
thoracolumbar region
with
neuritis, radiculitis, radiculopathy→M51.1
Lumbago, lumbalgia2 unique routes
due to displacement, intervertebral disc
with sciatica→M51.1
with sciatica
due to intervertebral disc disorder→M51.1

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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