K04.8 vs K09.0
K04.8 (Radicular cyst) compared with K09.0 (Developmental odontogenic cysts), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. K04.8 carries an Excludes2 note covering K09.0: “lateral periodontal cyst (K09.0)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Yes, when both are documented. K09.0 carries an Excludes2 note covering K04.8: “radicular cyst (K04.8)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| K04.8Radicular cyst | K09.0Developmental odontogenic cysts | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Radicular cyst is a billable ICD-10-CM diagnosis code (K04.8). | Developmental odontogenic cysts is a billable ICD-10-CM diagnosis code (K09.0). |
| Includes | Apical (periodontal) cyst Periapical cyst Residual radicular cyst | lesions showing histological features both of aneurysmal cyst and of another fibro-osseous lesion Dentigerous cyst Eruption cyst Follicular cyst |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources