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 | ✓ |
| K13.0 | Diseases of lips | ✓ |
| K13.1 | Cheek and lip biting | ✓ |
| K13.1 | Cheek and lip biting | ✓ |
| K13.2 | Leukoplakia and other disturbances of oral epithelium, including tongue | — |
| K13.2 | Leukoplakia and other disturbances of oral epithelium, including tongue | — |
| K13.3 | Hairy leukoplakia | ✓ |
| K13.3 | Hairy leukoplakia | ✓ |
| K13.4 | Granuloma and granuloma-like lesions of oral mucosa | ✓ |
| K13.4 | Granuloma and granuloma-like lesions of oral mucosa | ✓ |
| K13.5 | Oral submucous fibrosis | ✓ |
| K13.5 | Oral submucous fibrosis | ✓ |
| K13.6 | Irritative hyperplasia of oral mucosa | ✓ |
| K13.6 | Irritative hyperplasia of oral mucosa | ✓ |
| K13.7 | Other and unspecified lesions of oral mucosa | — |
| K13.7 | Other and unspecified lesions of oral mucosa | — |
| K13.21 | Leukoplakia of oral mucosa, including tongue | ✓ |
| K13.21 | Leukoplakia of oral mucosa, including tongue | ✓ |
| K13.22 | Minimal keratinized residual ridge mucosa | ✓ |
| K13.22 | Minimal keratinized residual ridge mucosa | ✓ |
| K13.23 | Excessive keratinized residual ridge mucosa | ✓ |
| K13.23 | Excessive keratinized residual ridge mucosa | ✓ |
| K13.24 | Leukokeratosis nicotina palati | ✓ |
| K13.24 | Leukokeratosis nicotina palati | ✓ |
| K13.29 | Other disturbances of oral epithelium, including tongue | ✓ |
| K13.29 | Other disturbances of oral epithelium, including tongue | ✓ |
| K13.70 | Unspecified lesions of oral mucosa | ✓ |
| K13.70 | Unspecified lesions of oral mucosa | ✓ |
| K13.79 | Other lesions of oral mucosa | ✓ |
| K13.79 | Other lesions of oral mucosa | ✓ |
Frequently asked questions
What is ICD-10-CM code K13?
K13 is an ICD-10-CM category covering Other diseases of lip and oral mucosa. It contains 30 more specific diagnosis codes, 26 of which are billable.
Is K13 a billable code?
No — K13 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example K13.0 — Diseases of lips). 26 of the 30 codes under K13 are billable.
What codes fall under K13?
K13 includes K13.0, K13.0, K13.1, K13.1, K13.2, plus 25 more. See the full list with descriptions and billable status above.
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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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