Billable / Specific Code
ICD-10-CM K13.21 is the diagnosis code for Leukoplakia of oral mucosa, including tongue. This code falls under the section "Diseases of oral cavity and salivary glands" within Chapter 11 — Diseases of the digestive system (K00-K95). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as K13.21. They are mutually exclusive:
Understanding where K13.21 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, K13.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
K13.21 is the ICD-10-CM diagnosis code for "Leukoplakia of oral mucosa, including tongue". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of K13.21 is K13.2 ("Leukoplakia and other disturbances of oral epithelium, including tongue"). K13.21 provides a more specific classification within this category.
K13.21 is located in Section K00-K14 — "Diseases of oral cavity and salivary glands" within Chapter 11 of the ICD-10-CM Tabular List.
Use K13.21 when the patients documented diagnosis matches "Leukoplakia of oral mucosa, including tongue" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Leukoplakia of oral mucosa, including tongue is K13.21.
Yes, K13.21 can be used as a primary diagnosis code since it is billable and specific.
K13.21 is in Chapter 11 of the ICD-10-CM Tabular List.
Type 1 Excludes for K13.21 include: hairy leukoplakia (K13.3); leukokeratosis nicotina palati (K13.24).
Yes, K13.21 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.