528Diseases of Oral Cavity, Salivary Glands, and Jaws: Stomatitis, aphthous ulcers, canker sore, diseases of lips
Diseases of the Digestive System
What this reference tells you
528 is an Ontario diagnostic code describing “Diseases of Oral Cavity, Salivary Glands, and Jaws: Stomatitis, aphthous ulcers, canker sore, diseases of lips.” It supports the diagnosis field of a claim and is distinct from the fee code identifying the service.
Before using this code
Confirm the current Ministry publication, the patient and provider context, the date of service, and documentation supporting the claim. A searchable reference does not establish eligibility or guarantee payment.