2026 ICD-10-CM Diagnosis Code M26.89Other dentofacial anomalies

ICD-10-CM Codes›M00–M99›M26-M27›M26

ICD-10-CM M26.89
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M26.89 is a billable ICD-10-CM diagnosis code for other dentofacial anomalies. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 157 through 159. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury, Disorders of jaw, and Disorders of teeth and gingiva.

Code Identity

ICD-10-CM Code
M26.89
Billable Status
Yes — Valid for Submission
Code Describes
Other dentofacial anomalies
Short Description
Other dentofacial anomalies
Same as the full description in the CMS dataset.
Parent Code
M26.8
Other dentofacial anomalies

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 CodeM26.89Other dentofacial anomalies

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal shape of mandibular condyle
  • Absence of mandibular condyle
  • Absent maxilla
  • Acute nasolabial angle
  • Atypical condylar angulation
  • Auriculo-condylar syndrome
  • Bifid mandibular condyle
  • Cant of occlusal plane down on left due to dental asymmetry
  • Cant of occlusal plane down on left due to skeletal asymmetry
  • Cant of occlusal plane down on right due to dental asymmetry
  • Cant of occlusal plane down on right due to skeletal asymmetry
  • Cheilognathoprosoposchisis
  • Cheilognathoschisis
  • Cleft mandible
  • Cleft upper lip, upper jaw AND palate
  • Congenital abnormal fusion of mandible
  • Congenital abnormal fusion of maxilla
  • Congenital abnormal shape of mandible
  • Congenital abnormal shape of maxilla
  • Congenital absence of jaw
  • Congenital absence of left mandibular condyle
  • Congenital absence of mandible
  • Congenital absence of maxilla
  • Congenital absence of right mandibular condyle
  • Congenital anomaly of mandible
  • Congenital anomaly of maxilla
  • Congenital failure of fusion between maxillary and mandibular processes
  • Congenital malformation of mandibular glenoid fossa
  • Decrease of chin to throat length
  • Decreased gonial angle
  • Decreased lower anterior face height
  • Decreased lower face height
  • Decreased mandibular vestibule depth
  • Decreased maxillary vestibular depth
  • Decreased posterior face height
  • Deep mentolabial sulcus
  • Deformity of facial bone
  • Deformity of mandibular condyle
  • Facial skeletal pattern - finding
  • Flat mandibular plane angle
  • Hemimaxillofacial dysplasia
  • Hyperdivergent mandibular plane angle
  • Hypodivergent mandibular plane angle
  • Incomplete ossification of mandible
  • Incomplete ossification of maxilla
  • Incomplete ossification of skull
  • Increase of chin to throat length
  • Increased gonial angle
  • Increased lower anterior face height
  • Increased lower face height
  • Increased posterior face height
  • Isolated congenital syngnathia
  • Lack of ossification of mandible
  • Lack of ossification of maxilla
  • Long face height
  • Long lower third of face
  • Long middle third of face
  • Long vertical length of upper lip
  • Low mandibular plane angle
  • Obtuse nasolabial angle
  • Oculotrichodysplasia
  • Oromandibular-limb hypogenesis spectrum
  • Prominent maxilla
  • Shallow mentolabial sulcus
  • Short lower third of face
  • Short vertical length of upper lip
  • Soft tissue impingement
  • Steep mandibular plane angle

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Anomaly, anomalous(congenital) (unspecified type)
      • dentofacial
        • specified type NEC
    • Distortion(s) (congenital)
      • jaw NEC
    • Narrowing
      • palate

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DEN001
Any dental condition including traumatic injury
Default principal diagnosis: inpatient No · outpatient No
CCSR MUS029
Disorders of jaw
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR DIG002
Disorders of teeth and gingiva
Default principal diagnosis: inpatient No · outpatient No
CCSR DEN002
Nontraumatic dental conditions
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Tooth Disorders

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

The full article covers:

  • What are teeth?
  • What are tooth disorders?
  • What causes tooth disorders?
  • What are the symptoms of tooth disorders?
  • How are tooth disorders diagnosed?
  • What are the treatments for tooth disorders?
  • Can tooth disorders be prevented?

Read the full article at MedlinePlus

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

Convert M26.89 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
524.89 Dentofacial anomaly NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M26.89Overview

Is M26.89 (Other dentofacial anomalies) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other dentofacial anomalies on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M26.89 group to?

When other dentofacial anomalies is the principal diagnosis on an inpatient stay, it groups to MS-DRG 157, 158, 159, with relative weights from 0.7085 to 1.7168 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M26.89?

Under the General Equivalence Mappings, other dentofacial anomalies converts to ICD-9-CM 524.89 (dentofacial anomaly NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.