K66.9 – Disorder of peritoneum, unspecified
ICD-10-CM 2027 diagnosis code · Diseases of peritoneum, retroperitoneum and pelvis
ICD-10-CM code
K66.9
- Code
K66.9(claims format:K669)- Description
- Disorder of peritoneum, unspecified
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 11. Diseases of the digestive system (K00-K95)
- Block
- K65-K6A Diseases of peritoneum, retroperitoneum and pelvis
- Parent codes
- K66
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
K66 – Other disorders of peritoneum
Index terms for K66.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in K66
Frequently asked questions
What is ICD-10 code K66.9?
K66.9 is the ICD-10-CM code for disorder of peritoneum, unspecified, in the block K65-K6A (Diseases of peritoneum, retroperitoneum and pelvis).
Is K66.9 a billable code?
Yes. K66.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does K66.9 belong to?
It belongs to category K66 – Other disorders of peritoneum.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.