ICD-10-CM Code M26.1

Anomalies of jaw-cranial base relationship

Version 2020 Non-Billable Code

Not Valid for Submission

M26.1 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of anomalies of jaw-cranial base relationship. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M26.1
Short Description:Anomalies of jaw-cranial base relationship
Long Description:Anomalies of jaw-cranial base relationship

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

  • 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

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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