K13.70 Unspecified lesions of oral mucosa

Billable ICD-10-CM code, FY2026.

Applies from 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)

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 528.9 Other and unspecified diseases of the oral soft tissues (approximate)

Diagnosis Index entries for K13.70

• Lesion (s) (nontraumatic) › oral mucosa

Nearby codes

• 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 (this code)
• K13.79 Other lesions of oral mucosa