ICD-10-CM 2027
ICD-10 code for excessive keratinization of alveolar ridge mucosa
From the official ICD-10-CM alphabetic index entry “Keratinization of alveolar ridge mucosa › excessive”. Page updated September 29, 2026.
About coding excessive keratinization of alveolar ridge mucosa
The ICD-10-CM code for excessive keratinization of alveolar ridge mucosa is K13.23 (Excessive keratinized residual ridge mucosa).
Within K13.2 (leukoplakia and other disturbances of oral epithelium, including tongue), K13.23 is specifically for excessive keratinized residual ridge mucosa. Related codes cover leukoplakia of oral mucosa, including tongue (K13.21), minimal keratinized residual ridge mucosa (K13.22), Leukokeratosis nicotina palati (K13.24) and other disturbances of oral epithelium, including tongue (K13.29).
Use an additional code to identify: alcohol abuse and dependence (F10.-), exposure to environmental tobacco smoke (Z77.22), exposure to tobacco smoke in the perinatal period (P96.81), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31) and 2 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about excessive keratinization of alveolar ridge mucosa ICD-10 codes
What is the ICD-10 code for excessive keratinization of alveolar ridge mucosa?
- K13.23 — Excessive keratinized residual ridge mucosa.
Is K13.23 billable?
- Yes. K13.23 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can K13.23 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict K13.23 as a principal diagnosis.
Is K13.23 a CC or MCC?
- No. K13.23 is neither a CC nor an MCC under MS-DRG v44.0.