ICD-10 Code K13.0 – Diseases of lips (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K13.0 – Diseases of lips
What it is
K13.0 covers nontraumatic diseases of the lips, including inflammatory, structural, or other documented lip disorders. Use it when the provider identifies a lip condition but does not specify a more exact diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include lip swelling, cracking, scaling, pain, ulceration, or visible lesions, depending on the underlying lip disorder.
When to use this code
Use K13.0 when the record states a disease of the lips without a more specific ICD-10-CM option. It is appropriate for documented lip inflammation, cheilitis, or other nonspecific lip pathology when the cause or subtype is not further defined.
Code the documented condition as written and avoid guessing the underlying etiology. If the chart gives a more specific diagnosis, such as a named lesion or systemic cause, use that code instead.
Do not use for
Do not use K13.0 for traumatic lip injury, congenital lip anomalies, or malignant lip neoplasms. Check documentation if the provider describes a more specific oral lesion or systemic disease.
Coding tip
Review the full note for a specific lip diagnosis before assigning K13.0, because more detailed documentation usually supports a more accurate code.