K09Cysts of oral region, not elsewhere classified
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use K09 directly
Use the most specific code supported by the record.
- Chapter XI
- Diseases of the digestive system
- Group K00-K14
- Diseases of oral cavity, salivary glands and jaws
- Official Vietnamese name
- Nang vùng miệng, không phân loại mục khác
- Additional WHO coding guidance
- Incl.: lesions showing histological features both of aneurysmal cyst and of another fibro-osseous lesion Excl.: radicular cyst (K04.8)
Related K09 codes
K09.0
Primary diagnosis candidate
Developmental odontogenic cysts
K09.1
Primary diagnosis candidate
Developmental (nonodontogenic) cysts of oral region
K09.2
Primary diagnosis candidate
Other cysts of jaw
K09.8
Primary diagnosis candidate
Other cysts of oral region, not elsewhere classified
K09.9
Primary diagnosis candidate
Cyst of oral region, unspecified
Clinical record checklist
View coding guide →- Confirm that the code matches the final documented diagnosis.
- Use one primary-diagnosis code and record only relevant additional conditions.
- Review Ministry indicators, inclusions, exclusions and notes.
- Do not infer a diagnosis beyond the clinical record.
2026 regulatory basis
Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.
