M27.0 vs M27.4
M27.0 (Developmental disorders of jaws) compared with M27.4 (Other and unspecified cysts of 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. M27.4 carries an Excludes1 note covering M27.0: “latent bone cyst of jaw (M27.0)”
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. M27.4 carries an Excludes1 note covering M27.0: “Stafne's cyst (M27.0)”
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
| M27.0Developmental disorders of jaws | M27.4Other and unspecified cysts of jaw | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Developmental disorders of jaws is a billable ICD-10-CM diagnosis code (M27.0). | Other and unspecified cysts of jaw is a non-billable ICD-10-CM category code (M27.4). |
| Includes | Latent bone cyst of jaw Stafne's cyst Torus mandibularis Torus palatinus | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources