M27 vs Q67.4
M27 (Other diseases of jaws) 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. M27 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).
Side by side
| M27Other diseases of jaws | 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 | Other diseases of jaws is a non-billable ICD-10-CM category code (M27). | 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