Other disorders of peritoneum (K66)
The ICD-10 codes in the K66 category cover various disorders affecting the peritoneum, the thin membrane lining the abdominal cavity. These codes specify conditions like peritoneal adhesions, hemoperitoneum, other named peritoneal disorders, and unspecified peritoneal conditions.
The ICD-10 code for peritoneal adhesions (K66.0) captures conditions where scar tissue forms after surgery or infection, binding organs such as the intestines, stomach, or pelvic peritoneum. Common synonyms include "intestinal entrapment" and "adhesion of mesentery," helping coders identify this code when these terms appear in documentation. K66.1 refers to hemoperitoneum, the presence of blood within the peritoneal cavity, also known by terms like "omental hemorrhage" or "retroperitoneal hematoma." The code K66.8 groups other specified peritoneal disorders including "frozen pelvis syndrome," "peritoneal pseudocyst," and "peritoneal fibrosis." Lastly, K66.9 is used when a peritoneal disorder is documented but not specified further, often noted as "disorder of pelvic peritoneum."
These detailed ICD-10 codes enable precise classification of peritoneal conditions, facilitating accurate medical record keeping and billing for care related to abdominal and pelvic membrane disorders.
Instructional Notations
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Hemoperitoneum
Accumulations of blood in the PERITONEAL CAVITY due to internal HEMORRHAGE.
Mesenteric Cyst
A rare intra-abdominal tumor in the MESENTERY. Mesenteric cysts are usually benign and can be very large fluid-filled (2000 mL) lesions.
Peritoneal Fibrosis
Disorder characterized by a wide range of structural changes in PERITONEUM, resulting from fibrogenic or inflammatory processes. Peritoneal fibrosis is a common complication in patients receiving PERITONEAL DIALYSIS and contributes to its gradual decrease in efficiency.
Pneumoperitoneum
A condition with trapped gas or air in the PERITONEAL CAVITY, usually secondary to perforation of the internal organs such as the LUNG and the GASTROINTESTINAL TRACT, or to recent surgery. Pneumoperitoneum may be purposely introduced to aid radiological examination.
Pneumoperitoneum, Artificial
Deliberate introduction of air into the peritoneal cavity.
