K13.23 – Excessive keratinized residual ridge mucosa

ICD-10-CM 2027 diagnosis code · Diseases of oral cavity and salivary glands

Billable code

ICD-10-CM code K13.23
Code
K13.23 (claims format: K1323)
Description
Excessive keratinized residual ridge mucosa
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
11. Diseases of the digestive system (K00-K95)
Block
K00-K14 Diseases of oral cavity and salivary glands
Parent codes
K13 › K13.2

Notes for K13.23

Applicable to:
  • Excessive keratinization of alveolar ridge mucosa

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

K13 – Other diseases of lip and oral mucosa

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)

K13.2 – Leukoplakia and other disturbances of oral epithelium, including tongue

Excludes1 (not coded here):
  • carcinoma in situ of oral epithelium (D00.0-)
  • hairy leukoplakia (K13.3)

Index terms for K13.23

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in K13.2

Frequently asked questions

What is ICD-10 code K13.23?

K13.23 is the ICD-10-CM code for excessive keratinized residual ridge mucosa, in the block K00-K14 (Diseases of oral cavity and salivary glands).

Is K13.23 a billable code?

Yes. K13.23 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does K13.23 belong to?

It belongs to category K13 – Other diseases of lip and oral mucosa.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.