ICD-10 Code K86.3 – Pseudocyst of pancreas (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K86.3 – Pseudocyst of pancreas
What it is
K86.3 identifies a pancreatic pseudocyst, a localized collection of fluid near or within the pancreas that is usually surrounded by a wall of fibrous tissue. It is not a true cyst because it lacks an epithelial lining.
Clinical signs
Clinical features vary; refer to documentation. Common findings include abdominal pain, a palpable mass, nausea, or symptoms from pressure on nearby structures. Imaging typically confirms the fluid collection and its relationship to the pancreas.
When to use this code
Use K86.3 when the provider documents a pancreatic pseudocyst, including cases found on imaging or noted after pancreatitis. Apply it when the diagnosis is established and the record specifically identifies a pseudocyst rather than another pancreatic fluid collection.
If the chart only describes a pancreatic cyst, mass, or fluid collection without confirming pseudocyst, check documentation. Code the documented condition as written and query when the terminology is unclear.
Do not use for
Do not use K86.3 for true pancreatic cysts, abscesses, or nonspecific pancreatic lesions. Check documentation if the record mentions postoperative collections or other abdominal fluid collections instead.
Coding tip
Verify that the provider specifically documents “pseudocyst” before assigning K86.3.