ICD-10-CM Code M26

Dentofacial anomalies [including malocclusion]

Version 2020 Non-Billable Code

Not Valid for Submission

M26 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of dentofacial anomalies [including malocclusion]. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M26
Short Description:Dentofacial anomalies [including malocclusion]
Long Description:Dentofacial anomalies [including malocclusion]

Consider the following ICD-10 codes with a higher level of specificity:

  • M26.0 - Major anomalies of jaw size
  • M26.00 - Unspecified anomaly of jaw size
  • M26.01 - Maxillary hyperplasia
  • M26.02 - Maxillary hypoplasia
  • M26.03 - Mandibular hyperplasia
  • M26.04 - Mandibular hypoplasia
  • M26.05 - Macrogenia
  • M26.06 - Microgenia
  • M26.07 - Excessive tuberosity of jaw
  • M26.09 - Other specified anomalies of jaw size
  • M26.1 - Anomalies of jaw-cranial base relationship
  • M26.10 - Unspecified anomaly of jaw-cranial base relationship
  • M26.11 - Maxillary asymmetry
  • M26.12 - Other jaw asymmetry
  • M26.19 - Other specified anomalies of jaw-cranial base relationship
  • M26.2 - Anomalies of dental arch relationship
  • M26.20 - Unspecified anomaly of dental arch relationship
  • M26.21 - Malocclusion, Angle's class
  • M26.211 - Malocclusion, Angle's class I
  • M26.212 - Malocclusion, Angle's class II
  • M26.213 - Malocclusion, Angle's class III
  • M26.219 - Malocclusion, Angle's class, unspecified
  • M26.22 - Open occlusal relationship
  • M26.220 - Open anterior occlusal relationship
  • M26.221 - Open posterior occlusal relationship
  • M26.23 - Excessive horizontal overlap
  • M26.24 - Reverse articulation
  • M26.25 - Anomalies of interarch distance
  • M26.29 - Other anomalies of dental arch relationship
  • M26.3 - Anomalies of tooth position of fully erupted tooth or teeth
  • M26.30 - Unspecified anomaly of tooth position of fully erupted tooth or teeth
  • M26.31 - Crowding of fully erupted teeth
  • M26.32 - Excessive spacing of fully erupted teeth
  • M26.33 - Horizontal displacement of fully erupted tooth or teeth
  • M26.34 - Vertical displacement of fully erupted tooth or teeth
  • M26.35 - Rotation of fully erupted tooth or teeth
  • M26.36 - Insufficient interocclusal distance of fully erupted teeth (ridge)
  • M26.37 - Excessive interocclusal distance of fully erupted teeth
  • M26.39 - Other anomalies of tooth position of fully erupted tooth or teeth
  • M26.4 - Malocclusion, unspecified
  • M26.5 - Dentofacial functional abnormalities
  • M26.50 - Dentofacial functional abnormalities, unspecified
  • M26.51 - Abnormal jaw closure
  • M26.52 - Limited mandibular range of motion
  • M26.53 - Deviation in opening and closing of the mandible
  • M26.54 - Insufficient anterior guidance
  • M26.55 - Centric occlusion maximum intercuspation discrepancy
  • M26.56 - Non-working side interference
  • M26.57 - Lack of posterior occlusal support
  • M26.59 - Other dentofacial functional abnormalities
  • M26.6 - Temporomandibular joint disorders
  • M26.60 - Temporomandibular joint disorder, unspecified
  • M26.601 - Right temporomandibular joint disorder, unspecified
  • M26.602 - Left temporomandibular joint disorder, unspecified
  • M26.603 - Bilateral temporomandibular joint disorder, unspecified
  • M26.609 - Unspecified temporomandibular joint disorder, unspecified side
  • M26.61 - Adhesions and ankylosis of temporomandibular joint
  • M26.611 - Adhesions and ankylosis of right temporomandibular joint
  • M26.612 - Adhesions and ankylosis of left temporomandibular joint
  • M26.613 - Adhesions and ankylosis of bilateral temporomandibular joint
  • M26.619 - Adhesions and ankylosis of temporomandibular joint, unspecified side
  • M26.62 - Arthralgia of temporomandibular joint
  • M26.621 - Arthralgia of right temporomandibular joint
  • M26.622 - Arthralgia of left temporomandibular joint
  • M26.623 - Arthralgia of bilateral temporomandibular joint
  • M26.629 - Arthralgia of temporomandibular joint, unspecified side
  • M26.63 - Articular disc disorder of temporomandibular joint
  • M26.631 - Articular disc disorder of right temporomandibular joint
  • M26.632 - Articular disc disorder of left temporomandibular joint
  • M26.633 - Articular disc disorder of bilateral temporomandibular joint
  • M26.639 - Articular disc disorder of temporomandibular joint, unspecified side
  • M26.69 - Other specified disorders of temporomandibular joint
  • M26.7 - Dental alveolar anomalies
  • M26.70 - Unspecified alveolar anomaly
  • M26.71 - Alveolar maxillary hyperplasia
  • M26.72 - Alveolar mandibular hyperplasia
  • M26.73 - Alveolar maxillary hypoplasia
  • M26.74 - Alveolar mandibular hypoplasia
  • M26.79 - Other specified alveolar anomalies
  • M26.8 - Other dentofacial anomalies
  • M26.81 - Anterior soft tissue impingement
  • M26.82 - Posterior soft tissue impingement
  • M26.89 - Other dentofacial anomalies
  • M26.9 - Dentofacial anomaly, unspecified

Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Dentofacial anomalies [including malocclusion] and other disorders of jaw (M26-M27)
      • Dentofacial anomalies [including malocclusion] (M26)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


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. Broken bones, especially the bones of your nose, cheekbone and jaw, are common facial injuries.

Certain diseases also lead to facial disorders. For example, nerve diseases like trigeminal neuralgia or Bell's palsy sometimes cause facial pain, spasms and trouble with eye or facial movement. Birth defects can also affect the face. They can cause underdeveloped or unusually prominent facial features or a lack of facial expression. Cleft lip and palate are a common facial birth defect.


[Learn More]

Jaw Injuries and Disorders

Your jaw is a set of bones that holds your teeth. It consists of two main parts. The upper part is the maxilla. It doesn't move. The moveable lower part is called the mandible. You move it when you talk or chew. The two halves of the mandible meet at your chin. The joint where the mandible meets your skull is the temporomandibular joint.

Jaw problems include

  • Fractures
  • Dislocations
  • Temporomandibular joint dysfunction
  • Osteonecrosis, which happens when your bones lose their blood supply
  • Cancers

Treatment of jaw problems depends on the cause.


[Learn More]

Tooth Disorders

What are teeth?

Your teeth are made of a hard, bonelike material. There are four parts:

  • Enamel, your tooth's hard surface
  • Dentin, the hard yellow part under the enamel
  • Cementum, the hard tissue that covers the root and keeps your teeth in place
  • Pulp, the soft connective tissue in the center of your tooth. It contains nerves and blood vessels.

You need your teeth for many activities that you may take for granted. These include eating, speaking and even smiling.

What are tooth disorders?

There are many different problems that can affect your teeth, including

  • Tooth decay - damage to a tooth's surface, which can lead to cavities
  • Abscess - a pocket of pus, caused by a tooth infection
  • Impacted tooth - a tooth did not erupt (break through the gum) when it should have. It is usually wisdom teeth that are impacted, but it can sometimes happen to other teeth.
  • Misaligned teeth (malocclusion)
  • Tooth injuries such as broken or chipped teeth

What causes tooth disorders?

The causes of tooth disorders varies, depending on the problem. Sometimes the cause is not taking good care of your teeth. In other cases, you may have been born with the problem or the cause is an accident.

What are the symptoms of tooth disorders?

The symptoms can vary, depending on the problem. Some of the more common symptoms include

  • Abnormal color or shape of the tooth
  • Tooth pain
  • Worn-down teeth

How are tooth disorders diagnosed?

Your dentist will ask about your symptoms, look at your teeth, and probe them with dental instruments. In some cases, you may need dental x-rays.

What are the treatments for tooth disorders?

The treatment will depend on the problem. Some common treatments are

  • Fillings for cavities
  • Root canals for cavities or infections that affect the pulp (inside of the tooth)
  • Extractions (pulling teeth) for teeth that are impacted and causing problems or are too damaged to be fixed. You may also have a tooth or teeth pulled because of overcrowding in your mouth.

Can tooth disorders be prevented?

The main thing that you can do to prevent tooth disorders is to take good care of your teeth:

  • Brush your teeth twice a day with a fluoride toothpaste
  • Clean between your teeth every day with floss or another type of between-the-teeth cleaner
  • Limit sugary snacks and drinks
  • Don't smoke or chew tobacco
  • See your dentist or oral health professional regularly

[Learn More]