K65 refers to Peritonitis, a group of conditions affecting the peritoneum (the lining of the abdominal cavity) or retroperitoneal space. These disorders can be life-threatening and often present as surgical emergencies requiring rapid diagnosis and treatment.

Symptoms

Severe abdominal pain – Especially diffuse or rebound tenderness in peritonitis (K65)
Fever and chills – Indicate underlying infection or inflammation
Abdominal distension – Common with retroperitoneal or peritoneal pathology
Nausea and vomiting – Often present in acute peritoneal conditions
Signs of sepsis – Hypotension, tachycardia, and confusion in severe cases

Diagnosis

Diagnosis of Peritonitis is made through clinical examination, peritoneal fluid analysis, blood cultures, abdominal ultrasound, CT scan, or exploratory surgery. Prompt diagnosis is essential to prevent systemic spread of infection or complications.

ICD10 Code Usage

ICD10 code K65 is used by emergency physicians, surgeons, and radiologists. It supports documentation for surgical intervention (e.g., laparotomy), antibiotic treatment, and critical care coding in hospitals or urgent care settings.

Related Codes

FAQs

Q1: What is ICD10 code K65?
A: It refers to Peritonitis, involving acute or chronic inflammation or disorders of the peritoneal or retroperitoneal spaces.

Q2: Is peritonitis (K65) always infectious?
A: Most often yes, but it can also result from chemical irritation (e.g., bile, gastric contents) or secondary to organ rupture.

Q3: What is included under K66?
A: K66 includes adhesions, encapsulating peritoneal sclerosis, or spontaneous hemoperitoneum not due to trauma.

Q4: How is K67 different?
A: K67 is used when peritoneal disorders are secondary to infections like tuberculosis or systemic sepsis already classified elsewhere.

Q5: Who treats these conditions?
A: General and trauma surgeons, critical care specialists, infectious disease experts, and radiologists.

Conclusion

ICD10 code K65 ensures proper classification and care planning for Peritonitis, helping guide emergent surgical decisions, infection control measures, and accurate clinical reporting.