Dentofacial anomalies [including malocclusion] and other disorders of jaw (M26-M27) ICD-10-CM
The M26–M27 section covers dentofacial anomalies [including malocclusion] and other disorders of jaw with 115 ICD-10-CM diagnosis codes, of which 94 are billable in fiscal year 2027. The section is organized into the 2 code ranges listed below.
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 Ranges in This Section 2 ranges · 115 codes
| Code Range | Title | Codes | Billable |
|---|---|---|---|
| M26 | Dentofacial anomalies [including malocclusion] (M26) | 95 | 78 |
| M27 | Other diseases of jaws (M27) | 20 | 16 |
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the M26–M27 Code Range
These conditions involve the jaws, tooth positions, how the teeth meet, and the jaw joints.
M26 groups differences in jaw size, jaw position relative to the skull, dental arch relationships, and positions of fully erupted teeth. It also includes bite alignment problems, functional abnormalities, jaw joint disorders, and conditions involving the bone that supports teeth.
M27 groups other jaw diseases. Its subdivisions distinguish developmental disorders, inflammation, cysts, problems associated with previous endodontic treatment, and dental implant failure.
Questions About This Page
How many codes are in the M26-M27 range?
The M26-M27 range contains 115 ICD-10-CM diagnosis codes in FY 2027. 94 of them are billable, and the rest are category headers that organize the section.
What conditions does M26-M27 cover?
The range covers dentofacial anomalies [including malocclusion] and other disorders of jaw. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
