Valid for Submission
K65.9 is a billable diagnosis code used to specify a medical diagnosis of peritonitis, unspecified. The code K65.9 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code K65.9 might also be used to specify conditions or terms like acute localized peritonitis caused by infection, aseptic peritonitis, bacterial peritonitis, fat necrosis of peritoneum, fibrinous peritonitis , infectious peritonitis, etc.
Unspecified diagnosis codes like K65.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code K65.9:
Inclusion TermsInclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Bacterial peritonitis NOS
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code K65.9 are found in the index:
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Acute localized peritonitis caused by infection
- Aseptic peritonitis
- Bacterial peritonitis
- Fat necrosis of peritoneum
- Fibrinous peritonitis
- Infectious peritonitis
- Mesenteric fat necrosis
- Mesenteric peritonitis with mesenteric fat necrosis
- Pneumococcal peritonitis
- Postoperative peritonitis
- Primary peritonitis
- Ventriculoperitoneal shunt-associated peritonitis
- CHYLOUS ASCITES-. presence of milky lymph chyle in the peritoneal cavity with or without infection.
- FAMILIAL MEDITERRANEAN FEVER-. a group of hereditary autoinflammation diseases characterized by recurrent fever abdominal pain headache rash pleurisy; and arthritis. orchitis; benign meningitis; and amyloidosis may also occur. homozygous or compound heterozygous mutations in marenostrin gene result in autosomal recessive transmission; simple heterozygous autosomal dominant form of the disease.
- PERITONITIS-. inflammation of the peritoneum lining the abdominal cavity as the result of infectious autoimmune or chemical processes. primary peritonitis is due to infection of the peritoneal cavity via hematogenous or lymphatic spread and without intra abdominal source. secondary peritonitis arises from the abdominal cavity itself through rupture or abscess of intra abdominal organs.
- PERITONITIS TUBERCULOUS-. a form of peritonitis seen in patients with tuberculosis characterized by lesion either as a miliary form or as a pelvic mass on the peritoneal surfaces. most patients have ascites abdominal swelling abdominal pain and other systemic symptoms such as fever; weight loss; and anemia.
- CORONAVIRUS FELINE-. a species of coronavirus infecting cats of all ages and commonly found in catteries and zoos. cats are often found carrying the virus but only a small proportion develop disease. feline coronavirus and feline infectious peritonitis virus fipv are virtually the same virus in genetic and antigenetic terms and are morphologically indistinguishable. since they only differ in their disease potential with fipv causing a more serious illness they are considered biotypes of each other.
- FELINE INFECTIOUS PERITONITIS-. common coronavirus infection of cats caused by the feline infectious peritonitis virus coronavirus feline. the disease is characterized by a long incubation period fever depression loss of appetite wasting and progressive abdominal enlargement. infection of cells of the monocyte macrophage lineage appears to be essential in fip pathogenesis.
Diagnostic Related Groups - MS-DRG Mapping
|MS-DRG||MS-DRG Title||MCD||Relative Weight|
|371||MAJOR GASTROINTESTINAL DISORDERS AND PERITONEAL INFECTIONS WITH MCC||06||1.7283|
|372||MAJOR GASTROINTESTINAL DISORDERS AND PERITONEAL INFECTIONS WITH CC||06||1.0276|
|373||MAJOR GASTROINTESTINAL DISORDERS AND PERITONEAL INFECTIONS WITHOUT CC/MCC||06||0.7435|
The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.
Convert K65.9 to ICD-9 Code
Information for Patients
Your peritoneum is the tissue that lines your abdominal wall and covers most of the organs in your abdomen. A liquid, peritoneal fluid, lubricates the surface of this tissue.
Disorders of the peritoneum are not common. They include
- Peritonitis - an inflammation of the peritoneum
- Complications from peritoneal dialysis
Your doctor may use imaging tests or lab tests to analyze the peritoneal fluid to diagnose the problem. Treatment of peritoneal disorders depends on the cause.
[Learn More in MedlinePlus]