K66
⚠ Non-billable
Other disorders of peritoneum
ICD-10-CM · FY2026 · Diseases of the Digestive System
Code
K66
System
ICD-10-CM
Billable
No — use specific code
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 K66?
ICD-10-CM code K66 represents Other disorders of peritoneum. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Digestive System chapter, effective October 1, 2025 – September 30, 2026.
Is K66 billable?
No. K66 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is K66 in?
K66 belongs to the Diseases of the Digestive System chapter (K00–K95) of ICD-10-CM.
Related codes in the K66 category
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