DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

M46 Other inflammatory spondylopathies

  • Header · not billable

M46 is not billable. The category heads 70 billable codes in FY2027, grouped under 8 subdivisions.

Index → code

  • Sacroiliitis NEC → M46.1
  • Discitis, diskitis → M46.40
  • Spondylopathyinflammatory → M46.90

Where it sits

  1. Chapter 13 Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. M45-M49 Spondylopathies (M45-M49)
  3. M46 Other inflammatory spondylopathies
Billable codes
70
Subdivisions
8
CC / MCC codes
19 / 0
HCC V28 codes
19
New FY2027
0
Index entries
74

Codes in M46

  1. M46.0
    Spinal enthesopathy
    Header
    Inclusion terms 1

    Inclusion terms

    • Disorder of ligamentous or muscular attachments of spine
  2. M46.00
    Spinal enthesopathy, site unspecified
    Billable
  3. M46.01
    Spinal enthesopathy, occipito-atlanto-axial region
    Billable
  4. M46.02
    Spinal enthesopathy, cervical region
    Billable
  5. M46.03
    Spinal enthesopathy, cervicothoracic region
    Billable
  6. M46.04
    Spinal enthesopathy, thoracic region
    Billable
  7. M46.05
    Spinal enthesopathy, thoracolumbar region
    Billable
  8. M46.06
    Spinal enthesopathy, lumbar region
    Billable
  9. M46.07
    Spinal enthesopathy, lumbosacral region
    Billable
  10. M46.08
    Spinal enthesopathy, sacral and sacrococcygeal region
    Billable
  11. M46.09
    Spinal enthesopathy, multiple sites in spine
    Billable
  12. M46.1
    Sacroiliitis, not elsewhere classified
    Billable
  13. M46.2
    Osteomyelitis of vertebra
    Header
  14. M46.20
    Osteomyelitis of vertebra, site unspecified
    BillableCC92
  15. M46.21
    Osteomyelitis of vertebra, occipito-atlanto-axial region
    BillableCC92
  16. M46.22
    Osteomyelitis of vertebra, cervical region
    BillableCC92
  17. M46.23
    Osteomyelitis of vertebra, cervicothoracic region
    BillableCC92
  18. M46.24
    Osteomyelitis of vertebra, thoracic region
    BillableCC92
  19. M46.25
    Osteomyelitis of vertebra, thoracolumbar region
    BillableCC92
  20. M46.26
    Osteomyelitis of vertebra, lumbar region
    BillableCC92
  21. M46.27
    Osteomyelitis of vertebra, lumbosacral region
    BillableCC92
  22. M46.28
    Osteomyelitis of vertebra, sacral and sacrococcygeal region
    BillableCC92
  23. M46.3
    Infection of intervertebral disc (pyogenic)
    Header
    Use additional code 1

    Use additional code

    • code (B95-B97) to identify infectious agent. B95 B97
  24. M46.30
    Infection of intervertebral disc (pyogenic), site unspecified
    BillableCC92
  25. M46.31
    Infection of intervertebral disc (pyogenic), occipito-atlanto-axial region
    BillableCC92
  26. M46.32
    Infection of intervertebral disc (pyogenic), cervical region
    BillableCC92
  27. M46.33
    Infection of intervertebral disc (pyogenic), cervicothoracic region
    BillableCC92
  28. M46.34
    Infection of intervertebral disc (pyogenic), thoracic region
    BillableCC92
  29. M46.35
    Infection of intervertebral disc (pyogenic), thoracolumbar region
    BillableCC92
  30. M46.36
    Infection of intervertebral disc (pyogenic), lumbar region
    BillableCC92
  31. M46.37
    Infection of intervertebral disc (pyogenic), lumbosacral region
    BillableCC92
  32. M46.38
    Infection of intervertebral disc (pyogenic), sacral and sacrococcygeal region
    BillableCC92
  33. M46.39
    Infection of intervertebral disc (pyogenic), multiple sites in spine
    BillableCC92
  34. M46.4
    Discitis, unspecified
    Header
  35. M46.40
    Discitis, unspecified, site unspecified
    Billable
  36. M46.41
    Discitis, unspecified, occipito-atlanto-axial region
    Billable
  37. M46.42
    Discitis, unspecified, cervical region
    Billable
  38. M46.43
    Discitis, unspecified, cervicothoracic region
    Billable
  39. M46.44
    Discitis, unspecified, thoracic region
    Billable
  40. M46.45
    Discitis, unspecified, thoracolumbar region
    Billable
  41. M46.46
    Discitis, unspecified, lumbar region
    Billable
  42. M46.47
    Discitis, unspecified, lumbosacral region
    Billable
  43. M46.48
    Discitis, unspecified, sacral and sacrococcygeal region
    Billable
  44. M46.49
    Discitis, unspecified, multiple sites in spine
    Billable
  45. M46.5
    Other infective spondylopathies
    Header
  46. M46.50
    Other infective spondylopathies, site unspecified
    Billable
  47. M46.51
    Other infective spondylopathies, occipito-atlanto-axial region
    Billable
  48. M46.52
    Other infective spondylopathies, cervical region
    Billable
  49. M46.53
    Other infective spondylopathies, cervicothoracic region
    Billable
  50. M46.54
    Other infective spondylopathies, thoracic region
    Billable
  51. M46.55
    Other infective spondylopathies, thoracolumbar region
    Billable
  52. M46.56
    Other infective spondylopathies, lumbar region
    Billable
  53. M46.57
    Other infective spondylopathies, lumbosacral region
    Billable
  54. M46.58
    Other infective spondylopathies, sacral and sacrococcygeal region
    Billable
  55. M46.59
    Other infective spondylopathies, multiple sites in spine
    Billable
  56. M46.8
    Other specified inflammatory spondylopathies
    Header
  57. M46.80
    Other specified inflammatory spondylopathies, site unspecified
    Billable
  58. M46.81
    Other specified inflammatory spondylopathies, occipito-atlanto-axial region
    Billable
  59. M46.82
    Other specified inflammatory spondylopathies, cervical region
    Billable
  60. M46.83
    Other specified inflammatory spondylopathies, cervicothoracic region
    Billable
  61. M46.84
    Other specified inflammatory spondylopathies, thoracic region
    Billable
  62. M46.85
    Other specified inflammatory spondylopathies, thoracolumbar region
    Billable
  63. M46.86
    Other specified inflammatory spondylopathies, lumbar region
    Billable
  64. M46.87
    Other specified inflammatory spondylopathies, lumbosacral region
    Billable
  65. M46.88
    Other specified inflammatory spondylopathies, sacral and sacrococcygeal region
    Billable
  66. M46.89
    Other specified inflammatory spondylopathies, multiple sites in spine
    Billable
  67. M46.9
    Unspecified inflammatory spondylopathy
    Header
  68. M46.90
    Unspecified inflammatory spondylopathy, site unspecified
    Billable
  69. M46.91
    Unspecified inflammatory spondylopathy, occipito-atlanto-axial region
    Billable
  70. M46.92
    Unspecified inflammatory spondylopathy, cervical region
    Billable
  71. M46.93
    Unspecified inflammatory spondylopathy, cervicothoracic region
    Billable
  72. M46.94
    Unspecified inflammatory spondylopathy, thoracic region
    Billable
  73. M46.95
    Unspecified inflammatory spondylopathy, thoracolumbar region
    Billable
  74. M46.96
    Unspecified inflammatory spondylopathy, lumbar region
    Billable
  75. M46.97
    Unspecified inflammatory spondylopathy, lumbosacral region
    Billable
  76. M46.98
    Unspecified inflammatory spondylopathy, sacral and sacrococcygeal region
    Billable
  77. M46.99
    Unspecified inflammatory spondylopathy, multiple sites in spine
    Billable

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

Chapter 13 instructions (Notes 1, Excludes2 10): printed on the chapter 13 page.

Index entries

  • Sacroiliitis NEC → M46.1
  • Discitis, diskitis → M46.40
  • Enthesopathy (peripheral)spinal → M46.00
  • Spondylitis (chronic)sacroiliac NEC → M46.1
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)vertebra → M46.20
  • Infection, infected, infective (opportunistic)intervertebral disc, pyogenic → M46.30
  • Discitis, diskitisoccipito-atlanto-axial region → M46.41
  • Discitis, diskitiscervical region → M46.42
  • Discitis, diskitiscervicothoracic region → M46.43
  • Discitis, diskitisthoracic region → M46.44
  • Discitis, diskitisthoracolumbar region → M46.45
  • Discitis, diskitislumbar region → M46.46
  • Discitis, diskitislumbosacral region → M46.47
  • Discitis, diskitissacrococcygeal region → M46.48
  • Discitis, diskitismultiple sites → M46.49
  • Spondylopathyinfective NEC → M46.50
  • Spondylopathyinflammatory → M46.90
  • Enthesopathy (peripheral)spinaloccipito-atlanto-axial region → M46.01
  • Enthesopathy (peripheral)spinalcervical region → M46.02
  • Enthesopathy (peripheral)spinalcervicothoracic region → M46.03
  • Enthesopathy (peripheral)spinalthoracic region → M46.04
  • Enthesopathy (peripheral)spinalthoracolumbar region → M46.05
  • Enthesopathy (peripheral)spinallumbar region → M46.06
  • Enthesopathy (peripheral)spinallumbosacral region → M46.07
  • Enthesopathy (peripheral)spinalsacrococcygeal region → M46.08
  • Enthesopathy (peripheral)spinalmultiple sites → M46.09
  • Change(s) (in) (of)inflammatorysacroiliac → M46.1
  • Inflammation, inflamed, inflammatory (with exudation)joint NECsacroiliac → M46.1
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)vertebraoccipito-atlanto-axial region → M46.21
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)vertebracervical region → M46.22
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)vertebracervicothoracic region → M46.23
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)vertebrathoracic region → M46.24
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)vertebrathoracolumbar region → M46.25
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)vertebralumbar region → M46.26
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)vertebralumbosacral region → M46.27
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)sacrum (tuberculous)nontuberculous → M46.28
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis)vertebrasacrococcygeal region → M46.28
  • Infection, infected, infective (opportunistic)intervertebral disc, pyogenicoccipito-atlanto-axial region → M46.31
  • Infection, infected, infective (opportunistic)intervertebral disc, pyogeniccervical region → M46.32
  • Infection, infected, infective (opportunistic)intervertebral disc, pyogeniccervicothoracic region → M46.33

34 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy