M26 vs Q67.4
M26 (Dentofacial anomalies [including malocclusion]) compared with Q67.4 (Other congenital deformities of skull, face and jaw), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. M26 carries an Excludes1 note covering Q67.4: “hemifacial atrophy or hypertrophy (Q67.4)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. Q67.4 carries an Excludes1 note covering M26: “dentofacial anomalies [including malocclusion] (M26.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| M26Dentofacial anomalies [including malocclusion] | Q67.4Other congenital deformities of skull, face and jaw | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Dentofacial anomalies [including malocclusion] is a non-billable ICD-10-CM category code (M26). | Other congenital deformities of skull, face and jaw is a billable ICD-10-CM diagnosis code (Q67.4). |
| Includes | — | Congenital depressions in skull Congenital hemifacial atrophy or hypertrophy Deviation of nasal septum, congenital Squashed or bent nose, congenital |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources