K04.6 vs K05.2
K04.6 (Periapical abscess with sinus) compared with K05.2 (Aggressive periodontitis), 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. K05.2 carries an Excludes1 note covering K04.6: “periapical abscess with sinus (K04.6)”
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
| K04.6Periapical abscess with sinus | K05.2Aggressive periodontitis | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Periapical abscess with sinus is a billable ICD-10-CM diagnosis code (K04.6). | Aggressive periodontitis is a non-billable ICD-10-CM category code (K05.2). |
| Includes | Dental abscess with sinus Dentoalveolar abscess with sinus | Acute pericoronitis |
| Use additional code | — | code to identify: alcohol abuse and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources