Posteruptive color changes of dental hard tissues

This diagnosis code signifies intrinsic discoloration of a tooth's enamel or dentin that develops after the tooth has fully erupted. This discoloration is not due to external stains or deposits but rather changes within the tooth structure itself, often affecting the aesthetic appearance.

Apply this code when documentation indicates a patient presents with intrinsic tooth discoloration that occurred post-eruption. This includes conditions like tetracycline staining, fluorosis, or discoloration due to internal resorption or pulpal necrosis, provided the etiology is clearly documented as affecting the hard tissues.

• Differentiate from extrinsic stains (deposits on teeth) which are coded elsewhere.
• Ensure the documentation specifies "posteruptive" to justify this code over developmental anomalies.
• Consider any underlying systemic conditions or medications that may contribute to the discoloration, and code them as secondary diagnoses if applicable.