K12.39
✓ Billable
Other oral mucositis (ulcerative)
ICD-10-CM · FY2026 · Diseases of the Digestive System
Code
K12.39
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Digestive System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code K12.39?
ICD-10-CM code K12.39 represents Other oral mucositis (ulcerative). It is a billable diagnosis code in the Diseases of the Digestive System chapter, effective October 1, 2025 – September 30, 2026.
Is K12.39 billable?
Yes. K12.39 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is K12.39 in?
K12.39 belongs to the Diseases of the Digestive System chapter (K00–K95) of ICD-10-CM.
Related codes in the K12 category
K12
Stomatitis and related lesions
Non-billable
K12.0
Recurrent oral aphthae
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K12.1
Other forms of stomatitis
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K12.2
Cellulitis and abscess of mouth
Billable
K12.3
Oral mucositis (ulcerative)
Non-billable
K12.30
Oral mucositis (ulcerative), unspecified
Billable
K12.31
Oral mucositis (ulcerative) due to antineoplastic therapy
Billable
K12.32
Oral mucositis (ulcerative) due to other drugs
Billable
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