M26.639 vs Q67.4
M26.639 (Articular disc disorder of temporomandibular joint, unspecified side) 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. M26.639 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 M26.639: “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
| M26.639Articular disc disorder of temporomandibular joint, unspecified side | Q67.4Other congenital deformities of skull, face and jaw | |
|---|---|---|
| Billing status | Billable | 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 | Articular disc disorder of temporomandibular joint, unspecified side is a billable ICD-10-CM diagnosis code (M26.639). | 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