K13 is the authoritative medical code for Other diseases of lip and oral mucosa. This classification is used in medical billing and clinical recording to specify the clinical criteria for other diseases of lip and oral mucosa (ICD-10-CM K13), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Other diseases of lip and oral mucosa is a non-billable ICD-10-CM category code K13. A more specific billable subcode must be selected for claims submission. Includes: epithelial disturbances of tongue. Excludes2 (not included here): certain disorders of gingiva and edentulous alveolar ridge K05-K06; cysts of oral region K09.-; diseases of tongue K14.-; stomatitis and related lesions K12.-. Use additional code: 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; tobacco dependence F17.-; tobacco use Z72.0.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for K13 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- epithelial disturbances of tongue
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- certain disorders of gingiva and edentulous alveolar ridge K05-K06
- cysts of oral region K09.-
- diseases of tongue K14.-
- stomatitis and related lesions K12.-
Use Additional Code
Supplementary codes the tabular list directs you to add.
- 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
- tobacco dependence F17.-
- tobacco use Z72.0
Frequently Asked Questions (FAQ) & Clinical Guidance
Can K13 be billed directly?
No. K13 (Other diseases of lip and oral mucosa) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Can K13 be reported alongside related conditions?
Per Excludes2 instructions, K13 and the following may both be reported when both are present: certain disorders of gingiva and edentulous alveolar ridge (K05-K06); cysts of oral region (K09.-); diseases of tongue (K14.-); stomatitis and related lesions (K12.-).
Is an additional code needed with K13?
Use additional code(s) to specify: 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).
Codes in This Family (15)
Official ICD-10-CM classifications in the same code family as K13, with their registry titles.
- K13.0 — Diseases of lips
- K13.1 — Cheek and lip biting
- K13.2 — Leukoplakia and other disturbances of oral epithelium, including tongue
- K13.21 — Leukoplakia of oral mucosa, including tongue
- K13.22 — Minimal keratinized residual ridge mucosa
- K13.23 — Excessive keratinized residual ridge mucosa
- K13.24 — Leukokeratosis nicotina palati
- K13.29 — Other disturbances of oral epithelium, including tongue
- K13.3 — Hairy leukoplakia
- K13.4 — Granuloma and granuloma-like lesions of oral mucosa
- K13.5 — Oral submucous fibrosis
- K13.6 — Irritative hyperplasia of oral mucosa
- K13.7 — Other and unspecified lesions of oral mucosa
- K13.70 — Unspecified lesions of oral mucosa
- K13.79 — Other lesions of oral mucosa
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code K08
Other disorders of teeth and supporting structures