K13.1

Cheek and lip biting

Billable code

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

Inherited from K13Other diseases of lip and oral mucosa
Includes

epithelial disturbances of tongue

Excludes 2

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 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)

Inherited from chapter 11Diseases of the digestive system
Excludes 2

certain conditions originating in the perinatal period (P04-P96) certain infectious and parasitic diseases (A00-B99) complications of pregnancy, childbirth and the puerperium (O00-O9A) congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) endocrine, nutritional and metabolic diseases (E00-E88) injury, poisoning and certain other consequences of external causes (S00-T88) neoplasms (C00-D49) symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Official Guidelines for K13.1

FY 2026 ›
I.C.11Chapter-specific guidanceChapter 11: Diseases of the Digestive System (K00-K95)

Find K13.1 in the alphabetic index

1 index path leads to this code