Phlebitis of portal vein

This code represents inflammation of the portal vein, a major blood vessel that carries blood from the gastrointestinal tract, gallbladder, pancreas, and spleen to the liver. This condition can lead to impaired blood flow to the liver and potentially serious complications.

Assign this code when documentation specifies phlebitis or thrombophlebitis affecting the portal vein. This diagnosis is often supported by imaging studies such as ultrasound, CT, or MRI demonstrating inflammation or thrombus within the portal venous system.

• Do not code this with K75.0 (pylephlebitic liver abscess) as per the Excludes1 note.
• Look for specific documentation of "portal vein" involvement; general phlebitis of other abdominal vessels would be coded elsewhere.
• Consider additional codes for any underlying cause (e.g., infection, malignancy) or associated complications.