ICDwise
K13 ⚠ Non-billable

Other diseases of lip and oral mucosa

ICD-10-CM · FY2026 · Diseases of the Digestive System

Code
K13
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Digestive System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Official coding notes

From CMS's ICD-10-CM Tabular List.

Includes
  • epithelial disturbances of tongue
Excludes2 — not included here, but may code together
  • 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)

Frequently asked questions

What is ICD-10 code K13?
ICD-10-CM code K13 represents Other diseases of lip and oral mucosa. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Digestive System chapter, effective October 1, 2025 – September 30, 2026.
Is K13 billable?
No. K13 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is K13 in?
K13 belongs to the Diseases of the Digestive System chapter (K00–K95) of ICD-10-CM.

Related codes in the K13 category

K13.0 Diseases of lips Billable K13.1 Cheek and lip biting Billable K13.2 Leukoplakia and other disturbances of oral epithelium, including tongue Non-billable K13.3 Hairy leukoplakia Billable K13.4 Granuloma and granuloma-like lesions of oral mucosa Billable K13.5 Oral submucous fibrosis Billable K13.6 Irritative hyperplasia of oral mucosa Billable K13.7 Other and unspecified lesions of oral mucosa Non-billable

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