K66.9
BillableDisorder of peritoneum, unspecified
Disorder of peritoneum, unspecified
Coding Notes
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •ascitesR18
- •peritoneal effusion (chronic)R18.8
Related Codes(3)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(24)
UMLS
- Disorder of peritoneumC0031142
- Disorder of peritoneum (disorder)C0031142
- Disorder of peritoneum, unspecifiedC0031142
- PERITONEAL DISC0031142
- Peritoneal DiseaseC0031142
- Peritoneal DiseasesC0031142
- Peritoneal DisorderC0031142
- Peritoneal DisordersC0031142
- Peritoneal disorderC0031142
- Peritoneal disorder NOSC0031142
- peritoneal diseaseC0031142
- peritoneal diseasesC0031142
- peritoneum diseasesC0031142
Clinical Terms
- Disorder of peritoneum (disorder)
- peritoneal diseases
- Peritoneal Disorder
- Peritoneal Disorders
- Peritoneal disorder NOS
- peritoneum diseases
- PERITONEAL DIS
- Disorder of pelvic peritoneum
- peritoneal disease
Frequently Asked Questions
What is the ICD-10 code for disorder of peritoneum, unspecified?
The ICD-10-CM code for disorder of peritoneum, unspecified is K66.9. The full clinical description is "Disorder of peritoneum, unspecified". K66.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code K66.9 mean?
ICD-10-CM code K66.9 represents “Disorder of peritoneum, unspecified”. It is classified under Chapter 11: Diseases of the Digestive System and is a billable/specific code that can be used on a claim.
Is K66.9 a billable code?
Yes, K66.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is K66.9 in?
K66.9 is in Chapter 11: Diseases of the Digestive System (codes K00-K95).
What SNOMED CT codes does K66.9 map to?
K66.9 maps to 2 SNOMED CT concepts: 118942006, 66579008. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for K66.9?
K66.9 is linked to 1 UMLS Concept Unique Identifier: C0031142. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does K66.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like disorder of peritoneum, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of K66.9?
K66.9 maps to the ICD-11 code: DC51.Y (Other specified disorders of peritoneum or retroperitoneum).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.