ICD-10-CM Code M26.0

Major anomalies of jaw size

Version 2020 Non-Billable Code

Not Valid for Submission

M26.0 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of major anomalies of jaw size. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M26.0
Short Description:Major anomalies of jaw size
Long Description:Major anomalies of jaw size

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

  • 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

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code M26.0:

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

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


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.


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