ICD-10 · PDGM grouping
M51 Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders
All 36 codes in the M51 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
36
Can lead a claim
36
Cannot lead a claim
0
What CMS assigns to M51
All 36 codes group to Musculoskeletal Rehabilitation. None of the 36 is assigned a comorbidity subgroup. Every code can lead a claim. CMS attaches a code-first note to 6 of the 36.
Code first
CMS grouper convention 125, on M51.A0, M51.A1, M51.A2. Code first:
- , if applicable, lumbar disc herniation (M51.06, M51.16, M51.26)
CMS grouper convention 126, on M51.A3, M51.A4, M51.A5. Code first:
- , if applicable, lumbosacral disc herniation (M51.17, M51.27)
Every code in M51
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| M51.0 Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with myelopathy | ||||
| M51.04 | Intervertebral disc disorders with myelopathy, thoracic regionCMS: Intervertebral disc disorders w myelopathy, thoracic region | Can lead a claim | E | None |
| M51.05 | Intervertebral disc disorders with myelopathy, thoracolumbar regionCMS: Intvrt disc disorders w myelopathy, thoracolumbar region | Can lead a claim | E | None |
| M51.06 | Intervertebral disc disorders with myelopathy, lumbar region | Can lead a claim | E | None |
| M51.1 Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with radiculopathy | ||||
| M51.14 | Intervertebral disc disorders with radiculopathy, thoracic regionCMS: Intvrt disc disorders w radiculopathy, thoracic region | Can lead a claim | E | None |
| M51.15 | Intervertebral disc disorders with radiculopathy, thoracolumbar regionCMS: Intvrt disc disorders w radiculopathy, thoracolumbar region | Can lead a claim | E | None |
| M51.16 | Intervertebral disc disorders with radiculopathy, lumbar regionCMS: Intervertebral disc disorders w radiculopathy, lumbar region | Can lead a claim | E | None |
| M51.17 | Intervertebral disc disorders with radiculopathy, lumbosacral regionCMS: Intvrt disc disorders w radiculopathy, lumbosacral region | Can lead a claim | E | None |
| M51.2 Other thoracic, thoracolumbar and lumbosacral intervertebral disc displacement | ||||
| M51.24 | Other intervertebral disc displacement, thoracic region | Can lead a claim | E | None |
| M51.25 | Other intervertebral disc displacement, thoracolumbar region | Can lead a claim | E | None |
| M51.26 | Other intervertebral disc displacement, lumbar region | Can lead a claim | E | None |
| M51.27 | Other intervertebral disc displacement, lumbosacral region | Can lead a claim | E | None |
| M51.3 Other thoracic, thoracolumbar and lumbosacral intervertebral disc degeneration | ||||
| M51.34 | Other intervertebral disc degeneration, thoracic region | Can lead a claim | E | None |
| M51.35 | Other intervertebral disc degeneration, thoracolumbar region | Can lead a claim | E | None |
| M51.36 Other intervertebral disc degeneration, lumbar region | ||||
| M51.360 | Other intervertebral disc degeneration, lumbar region with discogenic back pain onlyCMS: Other intvrt disc degen, lum rgn with discog back pain only | Can lead a claim | E | None |
| M51.361 | Other intervertebral disc degeneration, lumbar region with lower extremity pain onlyCMS: Other intvrt disc degen, lum region with low extrm pain only | Can lead a claim | E | None |
| M51.362 | Other intervertebral disc degeneration, lumbar region with discogenic back pain and lower extremity painCMS: Oth intvrt disc degen, lum rgn w discog bck & lw extrm pain | Can lead a claim | E | None |
| M51.369 | Other intervertebral disc degeneration, lumbar region without mention of lumbar back pain or lower extremity painCMS: Oth intvrt disc degen, lum rgn w/o lum bck or lw extrm pain | Can lead a claim | E | None |
| M51.37 Other intervertebral disc degeneration, lumbosacral region | ||||
| M51.370 | Other intervertebral disc degeneration, lumbosacral region with discogenic back pain onlyCMS: Oth intvrt disc degen, lumbosacr rgn w discog bck pain only | Can lead a claim | E | None |
| M51.371 | Other intervertebral disc degeneration, lumbosacral region with lower extremity pain onlyCMS: Oth intvrt disc degen, lumbosacr rgn w low extrm pain only | Can lead a claim | E | None |
| M51.372 | Other intervertebral disc degeneration, lumbosacral region with discogenic back pain and lower extremity painCMS: Oth intvrt disc degen, lumbosacr w discog bck & lw extrm pn | Can lead a claim | E | None |
| M51.379 | Other intervertebral disc degeneration, lumbosacral region without mention of lumbar back pain or lower extremity painCMS: Oth intvrt disc degen, lumbosacr w/o lum bck or lw extrm pn | Can lead a claim | E | None |
| M51.4 Schmorl's nodes | ||||
| M51.44 | Schmorl's nodes, thoracic region | Can lead a claim | E | None |
| M51.45 | Schmorl's nodes, thoracolumbar region | Can lead a claim | E | None |
| M51.46 | Schmorl's nodes, lumbar region | Can lead a claim | E | None |
| M51.47 | Schmorl's nodes, lumbosacral region | Can lead a claim | E | None |
| M51.8 Other thoracic, thoracolumbar and lumbosacral intervertebral disc disorders | ||||
| M51.84 | Other intervertebral disc disorders, thoracic region | Can lead a claim | E | None |
| M51.85 | Other intervertebral disc disorders, thoracolumbar region | Can lead a claim | E | None |
| M51.86 | Other intervertebral disc disorders, lumbar region | Can lead a claim | E | None |
| M51.87 | Other intervertebral disc disorders, lumbosacral region | Can lead a claim | E | None |
| M51.9 | Unspecified thoracic, thoracolumbar and lumbosacral intervertebral disc disorderCMS: Unsp thoracic, thoracolum and lumbosacr intvrt disc disorder | Can lead a claim | E | None |
| M51.A Other lumbar and lumbosacral annulus fibrosus disc defects | ||||
| M51.A0 | Intervertebral annulus fibrosus defect, lumbar region, unspecified sizeCMS: Intvrt annulus fibrosus defect, lumbar region, unsp size | Can lead a claim, code first applies | E | None |
| M51.A1 | Intervertebral annulus fibrosus defect, small, lumbar region | Can lead a claim, code first applies | E | None |
| M51.A2 | Intervertebral annulus fibrosus defect, large, lumbar region | Can lead a claim, code first applies | E | None |
| M51.A3 | Intervertebral annulus fibrosus defect, lumbosacral region, unspecified sizeCMS: Intvrt annulus fibrosus defect, lumbosacr region, unsp size | Can lead a claim, code first applies | E | None |
| M51.A4 | Intervertebral annulus fibrosus defect, small, lumbosacral regionCMS: Intvrt annulus fibrosus defect, small, lumbosacral region | Can lead a claim, code first applies | E | None |
| M51.A5 | Intervertebral annulus fibrosus defect, large, lumbosacral regionCMS: Intvrt annulus fibrosus defect, large, lumbosacral region | Can lead a claim, code first applies | E | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
The monthly home health regs digest
What CMS changed, what's due next, and what to do about it — one email a month, no fluff. Read the first issue