Other specified injury of superior mesenteric vein, sequela

This code signifies a long-term complication or residual effect resulting from a past injury to the superior mesenteric vein (SMV), which is a major blood vessel supplying the small intestine. These sequelae could include chronic thrombosis, stricture, or other persistent issues impacting blood flow or function of the SMV. The initial acute injury is no longer present, but its lasting consequences are being addressed.

Use this code when documenting and billing for treatment of chronic conditions directly attributable to a previous, resolved injury of the superior mesenteric vein. This applies when the patient is presenting for management of the lasting effects, such as chronic abdominal pain due to SMV stenosis, or follow-up for a previously treated SMV injury that has left a permanent impairment.

• Requires a seventh character of "S" to indicate sequela, meaning the patient is seen for the residual effects of a past injury.
• Always link this code to a related external cause code (V00-Y99) if the original injury's cause is known and relevant to the current encounter.
• Do not use for acute or initial treatment of a superior mesenteric vein injury; use the appropriate acute injury code (S35.338A/D) for those encounters.