K09.8 — Other cysts of oral region, not elsewhere classified
K09.8 is a billable, specific ICD-10-CM code for other cysts of oral region, not elsewhere classified. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Dermoid cyst
- Epidermoid cyst
- Lymphoepithelial cyst
- Epstein's pearl
Risk adjustment
K09.8 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
K09.8 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
- A57044Billing and Coding: Removal of Benign Skin Lesions
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
How K09.8 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to K09.8.
- Cyst›buccal
- Cyst›lymphoepithelial, oral soft tissue
- Cyst›mouth
- Epstein's›pearl
- Pearl›Epstein's
- Cyst›dermoid›mouth
- Cyst›dermoid›oral soft tissue
- Cyst›epidermal, epidermoid›mouth
- Cyst›epidermal, epidermoid›oral soft tissue
- Cyst›oral›region›specified NEC
- Cyst›oral›soft tissue›specified NEC
Related codes at this level
Codes that share K09. If K09.8 is not quite right, the correct code is usually one of these.
Questions about K09.8
- Is K09.8 a billable ICD-10-CM code?
- Yes. K09.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does K09.8 sit in the tabular list?
- Diseases of the digestive system (K00-K95), in the block Diseases of oral cavity and salivary glands (K00-K14).