DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

M26 Dentofacial anomalies [including malocclusion]

  • Header · not billable

M26 is not billable. The category heads 78 billable codes in FY2027, grouped under 10 subdivisions.

Index → code

Where it sits

  1. Chapter 13 Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. M26-M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw (M26-M27)
  3. M26 Dentofacial anomalies [including malocclusion]
Billable codes
78
Subdivisions
10
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
184

Codes in M26

  1. M26.0
    Major anomalies of jaw size
    Header
    Excludes1 2

    Excludes1

    • acromegaly (E22.0) E22.0
    • Robin's syndrome (Q87.0) Q87.0
  2. M26.00
    Unspecified anomaly of jaw size
    Billable
  3. M26.01
    Maxillary hyperplasia
    Billable
  4. M26.02
    Maxillary hypoplasia
    Billable
  5. M26.03
    Mandibular hyperplasia
    Billable
  6. M26.04
    Mandibular hypoplasia
    Billable
  7. M26.05
    Macrogenia
    Billable
  8. M26.06
    Microgenia
    Billable
  9. M26.07
    Excessive tuberosity of jaw
    Billable
    Inclusion terms 1

    Inclusion terms

    • Entire maxillary tuberosity
  10. M26.09
    Other specified anomalies of jaw size
    Billable
  11. M26.1
    Anomalies of jaw-cranial base relationship
    Header
  12. M26.10
    Unspecified anomaly of jaw-cranial base relationship
    Billable
  13. M26.11
    Maxillary asymmetry
    Billable
  14. M26.12
    Other jaw asymmetry
    Billable
  15. M26.19
    Other specified anomalies of jaw-cranial base relationship
    Billable
  16. M26.2
    Anomalies of dental arch relationship
    Header
  17. M26.20
    Unspecified anomaly of dental arch relationship
    Billable
  18. M26.21
    Malocclusion, Angle's class
    Header
  19. M26.211
    Malocclusion, Angle's class I
    Billable
    Inclusion terms 1

    Inclusion terms

    • Neutro-occlusion
  20. M26.212
    Malocclusion, Angle's class II
    Billable
    Inclusion terms 2

    Inclusion terms

    • Disto-occlusion Division I
    • Disto-occlusion Division II
  21. M26.213
    Malocclusion, Angle's class III
    Billable
    Inclusion terms 1

    Inclusion terms

    • Mesio-occlusion
  22. M26.219
    Malocclusion, Angle's class, unspecified
    Billable
  23. M26.22
    Open occlusal relationship
    Header
  24. M26.220
    Open anterior occlusal relationship
    Billable
    Inclusion terms 1

    Inclusion terms

    • Anterior open bite
  25. M26.221
    Open posterior occlusal relationship
    Billable
    Inclusion terms 1

    Inclusion terms

    • Posterior open bite
  26. M26.23
    Excessive horizontal overlap
    Billable
    Inclusion terms 1

    Inclusion terms

    • Excessive horizontal overjet
  27. M26.24
    Reverse articulation
    Billable
    Inclusion terms 1

    Inclusion terms

    • Crossbite (anterior) (posterior)
  28. M26.25
    Anomalies of interarch distance
    Billable
  29. M26.29
    Other anomalies of dental arch relationship
    Billable
    Inclusion terms 5

    Inclusion terms

    • Midline deviation of dental arch
    • Overbite (excessive) deep
    • Overbite (excessive) horizontal
    • Overbite (excessive) vertical
    • Posterior lingual occlusion of mandibular teeth
  30. M26.3
    Anomalies of tooth position of fully erupted tooth or teeth
    Header
    Excludes2 1

    Excludes2

    • embedded and impacted teeth (K01.-) K01
  31. M26.30
    Unspecified anomaly of tooth position of fully erupted tooth or teeth
    Billable
    Inclusion terms 3

    Inclusion terms

    • Abnormal spacing of fully erupted tooth or teeth NOS
    • Displacement of fully erupted tooth or teeth NOS
    • Transposition of fully erupted tooth or teeth NOS
  32. M26.31
    Crowding of fully erupted teeth
    Billable
  33. M26.32
    Excessive spacing of fully erupted teeth
    Billable
    Inclusion terms 1

    Inclusion terms

    • Diastema of fully erupted tooth or teeth NOS
  34. M26.33
    Horizontal displacement of fully erupted tooth or teeth
    Billable
    Inclusion terms 2

    Inclusion terms

    • Tipped tooth or teeth
    • Tipping of fully erupted tooth
  35. M26.34
    Vertical displacement of fully erupted tooth or teeth
    Billable
    Inclusion terms 3

    Inclusion terms

    • Extruded tooth
    • Infraeruption of tooth or teeth
    • Supraeruption of tooth or teeth
  36. M26.35
    Rotation of fully erupted tooth or teeth
    Billable
  37. M26.36
    Insufficient interocclusal distance of fully erupted teeth (ridge)
    Billable
    Inclusion terms 1

    Inclusion terms

    • Lack of adequate intermaxillary vertical dimension of fully erupted teeth
  38. M26.37
    Excessive interocclusal distance of fully erupted teeth
    Billable
    Inclusion terms 2

    Inclusion terms

    • Excessive intermaxillary vertical dimension of fully erupted teeth
    • Loss of occlusal vertical dimension of fully erupted teeth
  39. M26.39
    Other anomalies of tooth position of fully erupted tooth or teeth
    Billable
  40. M26.4
    Malocclusion, unspecified
    Billable
  41. M26.5
    Dentofacial functional abnormalities
    Header
    Excludes1 2

    Excludes1

    • bruxism (F45.8) F45.8
    • teeth-grinding NOS (F45.8) F45.8
  42. M26.50
    Dentofacial functional abnormalities, unspecified
    Billable
  43. M26.51
    Abnormal jaw closure
    Billable
  44. M26.52
    Limited mandibular range of motion
    Billable
  45. M26.53
    Deviation in opening and closing of the mandible
    Billable
  46. M26.54
    Insufficient anterior guidance
    Billable
    Inclusion terms 1

    Inclusion terms

    • Insufficient anterior occlusal guidance
  47. M26.55
    Centric occlusion maximum intercuspation discrepancy
    Billable
    Excludes1 1

    Excludes1

    • centric occlusion NOS (M26.59) M26.59
  48. M26.56
    Non-working side interference
    Billable
    Inclusion terms 1

    Inclusion terms

    • Balancing side interference
  49. M26.57
    Lack of posterior occlusal support
    Billable
  50. M26.59
    Other dentofacial functional abnormalities
    Billable
    Inclusion terms 4

    Inclusion terms

    • Centric occlusion (of teeth) NOS
    • Malocclusion due to abnormal swallowing
    • Malocclusion due to mouth breathing
    • Malocclusion due to tongue, lip or finger habits
  51. M26.6
    Temporomandibular joint disorders
    Header
    Excludes2 2

    Excludes2

    • current temporomandibular joint dislocation (S03.0) S03.0
    • current temporomandibular joint sprain (S03.4) S03.4
  52. M26.60
    Temporomandibular joint disorder, unspecified
    Header
  53. M26.601
    Right temporomandibular joint disorder, unspecified
    Billable
  54. M26.602
    Left temporomandibular joint disorder, unspecified
    Billable
  55. M26.603
    Bilateral temporomandibular joint disorder, unspecified
    Billable
  56. M26.609
    Unspecified temporomandibular joint disorder, unspecified side
    Billable
    Inclusion terms 1

    Inclusion terms

    • Temporomandibular joint disorder NOS
  57. M26.61
    Adhesions and ankylosis of temporomandibular joint
    Header
  58. M26.611
    Adhesions and ankylosis of right temporomandibular joint
    Billable
  59. M26.612
    Adhesions and ankylosis of left temporomandibular joint
    Billable
  60. M26.613
    Adhesions and ankylosis of bilateral temporomandibular joint
    Billable
  61. M26.619
    Adhesions and ankylosis of temporomandibular joint, unspecified side
    Billable
  62. M26.62
    Arthralgia of temporomandibular joint
    Header
  63. M26.621
    Arthralgia of right temporomandibular joint
    Billable
  64. M26.622
    Arthralgia of left temporomandibular joint
    Billable
  65. M26.623
    Arthralgia of bilateral temporomandibular joint
    Billable
  66. M26.629
    Arthralgia of temporomandibular joint, unspecified side
    Billable
  67. M26.63
    Articular disc disorder of temporomandibular joint
    Header
  68. M26.631
    Articular disc disorder of right temporomandibular joint
    Billable
  69. M26.632
    Articular disc disorder of left temporomandibular joint
    Billable
  70. M26.633
    Articular disc disorder of bilateral temporomandibular joint
    Billable
  71. M26.639
    Articular disc disorder of temporomandibular joint, unspecified side
    Billable
  72. M26.64
    Arthritis of temporomandibular joint
    Header
  73. M26.641
    Arthritis of right temporomandibular joint
    Billable
  74. M26.642
    Arthritis of left temporomandibular joint
    Billable
  75. M26.643
    Arthritis of bilateral temporomandibular joint
    Billable
  76. M26.649
    Arthritis of unspecified temporomandibular joint
    Billable
  77. M26.65
    Arthropathy of temporomandibular joint
    Header
  78. M26.651
    Arthropathy of right temporomandibular joint
    Billable
  79. M26.652
    Arthropathy of left temporomandibular joint
    Billable
  80. M26.653
    Arthropathy of bilateral temporomandibular joint
    Billable
  81. M26.659
    Arthropathy of unspecified temporomandibular joint
    Billable
  82. M26.69
    Other specified disorders of temporomandibular joint
    Billable
  83. M26.7
    Dental alveolar anomalies
    Header
  84. M26.70
    Unspecified alveolar anomaly
    Billable
  85. M26.71
    Alveolar maxillary hyperplasia
    Billable
  86. M26.72
    Alveolar mandibular hyperplasia
    Billable
  87. M26.73
    Alveolar maxillary hypoplasia
    Billable
  88. M26.74
    Alveolar mandibular hypoplasia
    Billable
  89. M26.79
    Other specified alveolar anomalies
    Billable
  90. M26.8
    Other dentofacial anomalies
    Header
  91. M26.81
    Anterior soft tissue impingement
    Billable
    Inclusion terms 1

    Inclusion terms

    • Anterior soft tissue impingement on teeth
  92. M26.82
    Posterior soft tissue impingement
    Billable
    Inclusion terms 1

    Inclusion terms

    • Posterior soft tissue impingement on teeth
  93. M26.89
    Other dentofacial anomalies
    Billable
  94. M26.9
    Dentofacial anomaly, unspecified
    Billable

Sources of each column.

Instructions

Notes that also apply

Block M26-M27 instructions (Excludes1 2): printed on the block page.

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

Index entries

  • Macrogenia → M26.05
  • Microgenia → M26.06
  • Tuberosity, entire maxillary → M26.07
  • Macrognathia, macrognathism (congenital) (mandibular) (maxillary) → M26.09
  • Micrognathia, micrognathism (congenital) (mandibular) (maxillary) → M26.09
  • Opisthognathism → M26.09
  • Retrusion, premaxilla (developmental) → M26.09
  • Prognathism (mandibular) (maxillary) → M26.19
  • Retrognathia, retrognathism (mandibular) (maxillary) → M26.19
  • Neutroclusion → M26.211
  • Disto-occlusion (Division I) (Division II) → M26.212
  • Mesio-occlusion → M26.213
  • Antero-occlusion → M26.220
  • Overjet (excessive horizontal) → M26.23
  • Overlap, excessive horizontal (teeth) → M26.23
  • Articulation, reverse (teeth) → M26.24
  • Crossbite (anterior) (posterior) → M26.24
  • Abocclusion → M26.29
  • Apertognathia → M26.29
  • Closed bite → M26.29
  • Overbite (deep) (excessive) (horizontal) (vertical) → M26.29
  • Direction, teeth, abnormal, fully erupted → M26.30
  • Imbrication, teeth,, fully erupted → M26.30
  • Crowding, tooth, teeth, fully erupted → M26.31
  • Diastema, tooth, teeth, fully erupted → M26.32
  • Tipped tooth (teeth) → M26.33
  • Extruded tooth (teeth) → M26.34
  • Infraeruption of tooth (teeth) → M26.34
  • Supraeruption of tooth (teeth) → M26.34
  • Rake teeth, tooth → M26.39
  • Snaggle teeth, tooth → M26.39
  • Malocclusion (teeth) → M26.4
  • Guidance, insufficient anterior (occlusal) → M26.54
  • Balancing side interference → M26.56
  • Non-working side interference → M26.56
  • Temporomandibular joint pain-dysfunction syndrome → M26.62-
  • Costen's syndrome or complex → M26.69
  • Hyperplasia, hyperplasticmaxilla, maxillary → M26.01
  • Hypoplasia, hypoplasticmaxillary → M26.02
  • Hyperplasia, hyperplasticmandible, mandibular → M26.03

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

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