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K13

Non-billable

Other diseases of lip and oral mucosa

K13 is the ICD-10-CM code for Other diseases of lip and oral mucosa. It is a non-billable category code — use a more specific child code such as K13.0 for billing.

Status
Header (non-billable)
Chapter
K00-K95
Subcodes
8
Edition
FY2026

K00-K95 Diseases of the digestive system

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)

Frequently asked questions

What is ICD-10 code K13?
K13 is the ICD-10-CM code for "Other diseases of lip and oral mucosa". It falls under K00-K95 Diseases of the digestive system.
Is K13 a billable code?
No — K13 is a non-billable header code. Use a more specific child code (such as K13.0) for billing.
What are the subcodes of K13?
K13 has 8 more specific child codes, including K13.0, K13.1, K13.2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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