K12.1 Other forms of stomatitis

Billable ICD-10-CM code, FY2026.

Applicable to

• Stomatitis NOS
• Denture stomatitis
• Ulcerative stomatitis
• Vesicular stomatitis

Excludes1 (never code together)

• acute necrotizing ulcerative stomatitis (A69.1)
• Vincent's stomatitis (A69.1)

Applies from K12 Stomatitis and related lesions

Excludes1 (never code together)

• cancrum oris (A69.0)
• cheilitis (K13.0)
• gangrenous stomatitis (A69.0)
• herpesviral [herpes simplex] gingivostomatitis (B00.2)
• noma (A69.0)

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)

• 528.09 Other stomatitis and mucositis (ulcerative) (approximate)

Code annotations containing back-references to K12.1

Back-references to K12

• Type 2 Excludes: K13 Other diseases of lip and oral mucosa ("stomatitis and related lesions (K12.-)")
• Use Additional: L51 Erythema multiforme ("stomatitis (K12.-)")

Diagnosis Index entries for K12.1

• Catarrh, catarrhal (acute) (febrile) (infectious) (inflammation) › mouth
• Inflammation, inflamed, inflammatory (with exudation) › mouth
• Stomatitis (denture) (ulcerative)
• Stomatitis (denture) (ulcerative) › catarrhal
• Stomatitis (denture) (ulcerative) › follicular
• Stomatitis (denture) (ulcerative) › malignant
• Stomatitis (denture) (ulcerative) › membranous acute
• Stomatitis (denture) (ulcerative) › septic
• Stomatitis (denture) (ulcerative) › vesicular
• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › buccal (cavity) (traumatic)
• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › oral mucosa (traumatic)
• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › palate (soft)
• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › stomatitis

Nearby codes

• K12 Stomatitis and related lesions
• K12.0 Recurrent oral aphthae
• K12.1 Other forms of stomatitis (this code)
• K12.2 Cellulitis and abscess of mouth
• K12.3 Oral mucositis (ulcerative)
• K12.30 Oral mucositis (ulcerative), unspecified
• K12.31 Oral mucositis (ulcerative) due to antineoplastic therapy
• K12.32 Oral mucositis (ulcerative) due to other drugs