M26 — Dentofacial anomalies [including malocclusion]
Not billable
Is M26 billable?
No — M26 is a non-billable header code. M26 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath M26.
Billable codes under this header
- M26.4Malocclusion, unspecified
- M26.9Dentofacial anomaly, unspecified
- M26.00Unspecified anomaly of jaw size
- M26.01Maxillary hyperplasia
- M26.02Maxillary hypoplasia
- M26.03Mandibular hyperplasia
- M26.04Mandibular hypoplasia
- M26.05Macrogenia
- M26.06Microgenia
- M26.07Excessive tuberosity of jaw
- M26.09Other specified anomalies of jaw size
- M26.10Unspecified anomaly of jaw-cranial base relationship
- M26.11Maxillary asymmetry
- M26.12Other jaw asymmetry
- M26.19Other specified anomalies of jaw-cranial base relationship
- M26.20Unspecified anomaly of dental arch relationship
- M26.23Excessive horizontal overlap
- M26.24Reverse articulation
- M26.25Anomalies of interarch distance
- M26.29Other anomalies of dental arch relationship
- M26.30Unspecified anomaly of tooth position of fully erupted tooth or teeth
- M26.31Crowding of fully erupted teeth
- M26.32Excessive spacing of fully erupted teeth
- M26.33Horizontal displacement of fully erupted tooth or teeth
- M26.34Vertical displacement of fully erupted tooth or teeth
- M26.35Rotation of fully erupted tooth or teeth
- M26.36Insufficient interocclusal distance of fully erupted teeth (ridge)
- M26.37Excessive interocclusal distance of fully erupted teeth
- M26.39Other anomalies of tooth position of fully erupted tooth or teeth
- M26.50Dentofacial functional abnormalities, unspecified
- M26.51Abnormal jaw closure
- M26.52Limited mandibular range of motion
- M26.53Deviation in opening and closing of the mandible
- M26.54Insufficient anterior guidance
- M26.55Centric occlusion maximum intercuspation discrepancy
- M26.56Non-working side interference
- M26.57Lack of posterior occlusal support
- M26.59Other dentofacial functional abnormalities
- M26.69Other specified disorders of temporomandibular joint
- M26.70Unspecified alveolar anomaly
- M26.71Alveolar maxillary hyperplasia
- M26.72Alveolar mandibular hyperplasia
- M26.73Alveolar maxillary hypoplasia
- M26.74Alveolar mandibular hypoplasia
- M26.79Other specified alveolar anomalies
- M26.81Anterior soft tissue impingement
- M26.82Posterior soft tissue impingement
- M26.89Other dentofacial anomalies
- M26.211Malocclusion, Angle's class I
- M26.212Malocclusion, Angle's class II
- M26.213Malocclusion, Angle's class III
- M26.219Malocclusion, Angle's class, unspecified
- M26.220Open anterior occlusal relationship
- M26.221Open posterior occlusal relationship
- M26.601Right temporomandibular joint disorder, unspecified
- M26.602Left temporomandibular joint disorder, unspecified
- M26.603Bilateral temporomandibular joint disorder, unspecified
- M26.609Unspecified temporomandibular joint disorder, unspecified side
- M26.611Adhesions and ankylosis of right temporomandibular joint
- M26.612Adhesions and ankylosis of left temporomandibular joint
M26 at a glance
| Code | M26 |
|---|---|
| Description | Dentofacial anomalies [including malocclusion] |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together — inherited from M26-M27
The conditions below can never be reported together with M26 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M26, but a patient may have both at the same time. When documentation supports it, M26 and the excluded code may both be reported.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
What codes fall under M26? (10)
- M26.0Major anomalies of jaw sizenot billable
- M26.1Anomalies of jaw-cranial base relationshipnot billable
- M26.2Anomalies of dental arch relationshipnot billable
- M26.3Anomalies of tooth position of fully erupted tooth or teethnot billable
- M26.4Malocclusion, unspecified
- M26.5Dentofacial functional abnormalitiesnot billable
- M26.6Temporomandibular joint disordersnot billable
- M26.7Dental alveolar anomaliesnot billable
- M26.8Other dentofacial anomaliesnot billable
- M26.9Dentofacial anomaly, unspecified
How long has M26 existed?
M26 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with M26?
ICD-10-CM declares these codes mutually exclusive with M26 — exactly one of each pair can be correct for a given encounter.