K13.21
Billable codeLeukoplakia of oral mucosa, including tongue
The ICD-10 code for leukoplakia of oral mucosa, including tongue is K13.21.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Leukokeratosis of oral mucosa
- Leukoplakia of gingiva, lips, tongue
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- K13.22Minimal keratinized residual ridge mucosa
- K13.23Excessive keratinized residual ridge mucosa
- K13.24Leukokeratosis nicotina palati
- K13.29Other disturbances of oral epithelium, including tongue
- K13.21Leukoplakia of oral mucosa, including tongue
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 5286Approximate match
Associated MS-DRGs
K13.21 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.
- DRG 011Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC
- DRG 012Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC
- DRG 013Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC
- DRG 157Dental and Oral Diseases with MCC
- DRG 158Dental and Oral Diseases with CC
- DRG 159Dental and Oral Diseases without CC/MCC