ICD-10-CM > K00-K95 > K00-K14 > K13 > K13.2 K13.2 Leukoplakia and other disturbances of oral epithelium, including tongue Non-Billable/Non-Specific Type 1 Excludes carcinoma in situ of oral epithelium (D00.0-)hairy leukoplakia (K13.3) Codes K13.21Leukoplakia of oral mucosa, including tongueK13.22Minimal keratinized residual ridge mucosaK13.23Excessive keratinized residual ridge mucosaK13.24Leukokeratosis nicotina palatiK13.29Other disturbances of oral epithelium, including tongue