Version 2024

2024 ICD-10-CM Diagnosis Code M26.0

Major anomalies of jaw size

ICD-10-CM Code:
M26.0
ICD-10 Code for:
Major anomalies of jaw size
Is Billable?
Not Valid for Submission
Code Navigator:

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)

M26.0 is a non-specific and non-billable diagnosis 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 specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Major anomalies of jaw size

Non-specific codes like M26.0 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for major anomalies of jaw size:

  • Use M26.00 for Unspecified anomaly of jaw size - BILLABLE CODE

  • Use M26.01 for Maxillary hyperplasia - BILLABLE CODE

  • Use M26.02 for Maxillary hypoplasia - BILLABLE CODE

  • Use M26.03 for Mandibular hyperplasia - BILLABLE CODE

  • Use M26.04 for Mandibular hypoplasia - BILLABLE CODE

  • Use M26.05 for Macrogenia - BILLABLE CODE

  • Use M26.06 for Microgenia - BILLABLE CODE

  • Use M26.07 for Excessive tuberosity of jaw - BILLABLE CODE

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

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


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.

Patient Education


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 (broken bones)
  • 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 in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.