2027 ICD-10-CM Diagnosis Code M26Dentofacial anomalies [including malocclusion]

ICD-10-CM Codes›M00–M99›M26-M27›M26

ICD-10-CM M26
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M26 is a non-billable ICD-10-CM category code for dentofacial anomalies [including malocclusion], so it cannot be submitted on claims. Use a more specific code from this category instead, such as M26.00, M26.01, M26.02, and M26.03.

Code Identity

ICD-10-CM Code
M26
Billable Status
No — Non-Billable Category
Code Describes
Dentofacial anomalies [including malocclusion]
Short Description
Dentofacial anomalies [including malocclusion]
Same as the full description in the CMS dataset.
Chapter
M26-M27
Dentofacial anomalies [including malocclusion] and other disorders of jaw

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM26-M27Dentofacial anomalies [including malocclusion] and other disorders of jaw
CategoryM26Dentofacial anomalies [including malocclusion]
This CodeM26Dentofacial anomalies [including malocclusion]

Specific Coding for Dentofacial anomalies [including malocclusion]Overview

Non-specific codes like M26 require more characters. Use one of these billable codes instead:

  • M26.0 for Major anomalies of jaw size

  • Use M26.00 for Unspecified anomaly of jaw size

  • Use M26.01 for Maxillary hyperplasia

  • Use M26.02 for Maxillary hypoplasia

  • Use M26.03 for Mandibular hyperplasia

  • Use M26.04 for Mandibular hypoplasia

  • Use M26.05 for Macrogenia

  • Use M26.06 for Microgenia

  • Use M26.07 for Excessive tuberosity of jaw

  • Use M26.09 for Other specified anomalies of jaw size

  • M26.1 for Anomalies of jaw-cranial base relationship

  • Use M26.10 for Unspecified anomaly of jaw-cranial base relationship

  • Use M26.11 for Maxillary asymmetry

  • Use M26.12 for Other jaw asymmetry

  • Use M26.19 for Other specified anomalies of jaw-cranial base relationship

  • M26.2 for Anomalies of dental arch relationship

  • Use M26.20 for Unspecified anomaly of dental arch relationship

  • M26.21 for Malocclusion, Angle's class

  • M26.22 for Open occlusal relationship

  • Use M26.23 for Excessive horizontal overlap

  • Use M26.24 for Reverse articulation

  • Use M26.25 for Anomalies of interarch distance

  • Use M26.29 for Other anomalies of dental arch relationship

  • M26.3 for Anomalies of tooth position of fully erupted tooth or teeth

  • Use M26.30 for Unspecified anomaly of tooth position of fully erupted tooth or teeth

  • Use M26.31 for Crowding of fully erupted teeth

  • Use M26.32 for Excessive spacing of fully erupted teeth

  • Use M26.33 for Horizontal displacement of fully erupted tooth or teeth

  • Use M26.34 for Vertical displacement of fully erupted tooth or teeth

  • Use M26.35 for Rotation of fully erupted tooth or teeth

  • Use M26.36 for Insufficient interocclusal distance of fully erupted teeth (ridge)

  • Use M26.37 for Excessive interocclusal distance of fully erupted teeth

  • Use M26.39 for Other anomalies of tooth position of fully erupted tooth or teeth

  • Use M26.4 for Malocclusion, unspecified

  • M26.5 for Dentofacial functional abnormalities

  • Use M26.50 for Dentofacial functional abnormalities, unspecified

  • Use M26.51 for Abnormal jaw closure

  • Use M26.52 for Limited mandibular range of motion

  • Use M26.53 for Deviation in opening and closing of the mandible

  • Use M26.54 for Insufficient anterior guidance

  • Use M26.55 for Centric occlusion maximum intercuspation discrepancy

  • Use M26.56 for Non-working side interference

  • Use M26.57 for Lack of posterior occlusal support

  • Use M26.59 for Other dentofacial functional abnormalities

  • M26.6 for Temporomandibular joint disorders

  • M26.60 for Temporomandibular joint disorder, unspecified

  • M26.61 for Adhesions and ankylosis of temporomandibular joint

  • M26.62 for Arthralgia of temporomandibular joint

  • M26.63 for Articular disc disorder of temporomandibular joint

  • M26.64 for Arthritis of temporomandibular joint

  • M26.65 for Arthropathy of temporomandibular joint

  • Use M26.69 for Other specified disorders of temporomandibular joint

  • M26.7 for Dental alveolar anomalies

  • Use M26.70 for Unspecified alveolar anomaly

  • Use M26.71 for Alveolar maxillary hyperplasia

  • Use M26.72 for Alveolar mandibular hyperplasia

  • Use M26.73 for Alveolar maxillary hypoplasia

  • Use M26.74 for Alveolar mandibular hypoplasia

  • Use M26.79 for Other specified alveolar anomalies

  • M26.8 for Other dentofacial anomalies

  • Use M26.81 for Anterior soft tissue impingement

  • Use M26.82 for Posterior soft tissue impingement

  • Use M26.89 for Other dentofacial anomalies

  • Use M26.9 for Dentofacial anomaly, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M26: its own notes plus those printed at block M26-M27 and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block M26-M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw applies to 94 codes
  • hemifacial atrophy or hypertrophy (Q67.4)
  • unilateral condylar hyperplasia or hypoplasia (M27.8)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Notes

General instructions on how these codes are used.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M26, its category, or a range that includes it.

Excludes1 4

These codes carry an Excludes1 note naming M26: they are not reported together with it, unless the two conditions are unrelated.

  • Q18 Other congenital malformations of face and neck
    dentofacial anomalies [including malocclusion] (M26.-)
  • Q38 Other congenital malformations of tongue, mouth and pharynx
    dentofacial anomalies (M26.-)
  • Q67.4 Other congenital deformities of skull, face and jaw
    dentofacial anomalies [including malocclusion] (M26.-)
  • Q75 Other congenital malformations of skull and face bones
    dentofacial anomalies [including malocclusion] (M26.-)

Excludes2 2

These codes carry an Excludes2 note naming M26: its condition is not part of those codes, and both may be reported when the patient has both.

  • K08 Other disorders of teeth and supporting structures
    dentofacial anomalies [including malocclusion] (M26.-)
  • M95 Other acquired deformities of musculoskeletal system and connective tissue
    dentofacial anomalies [including malocclusion] (M26.-)

Patient EducationClinical

Facial Injuries and Disorders

Face injuries and disorders can cause pain and affect how you look. In severe cases, they can affect sight, speech, breathing and your ability to swallow. Fractures (broken bones), especially in the bones of your nose, cheekbone and jaw, are common facial injuries.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M26Overview

What is the ICD-10 code for dentofacial anomalies [including malocclusion]?

M26 is the ICD-10-CM category for dentofacial anomalies [including malocclusion], but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is M26 (Dentofacial anomalies [including malocclusion]) a billable code?

No. This is a category header that groups the codes for dentofacial anomalies [including malocclusion], and headers cannot be submitted on claims. Claims for dentofacial anomalies [including malocclusion] need a more specific code from this category, such as M26.00, M26.01, and M26.02.

Can M26 be reported with Q67.4?

Not as a rule. The Excludes1 note at block M26-M27, which applies to M26, lists "hemifacial atrophy or hypertrophy (Q67.4)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).