K13: Other diseases of lip and oral mucosa

Codes under K13 (Other diseases of lip and oral mucosa). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
K13.0	Diseases of lips	✓
K13.1	Cheek and lip biting	✓
K13.2	Leukoplakia and other disturbances of oral epithelium, including tongue	—
K13.3	Hairy leukoplakia	✓
K13.4	Granuloma and granuloma-like lesions of oral mucosa	✓
K13.5	Oral submucous fibrosis	✓
K13.6	Irritative hyperplasia of oral mucosa	✓
K13.7	Other and unspecified lesions of oral mucosa	—
K13.21	Leukoplakia of oral mucosa, including tongue	✓
K13.22	Minimal keratinized residual ridge mucosa	✓
K13.23	Excessive keratinized residual ridge mucosa	✓
K13.24	Leukokeratosis nicotina palati	✓
K13.29	Other disturbances of oral epithelium, including tongue	✓
K13.70	Unspecified lesions of oral mucosa	✓
K13.79	Other lesions of oral mucosa	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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