ICD-10 Code I87.009 – Postthrombotic syndrome without complications of unspecified extremity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I87.009 – Postthrombotic syndrome without complications of unspecified extremity
What it is
I87.009 identifies postthrombotic syndrome affecting an unspecified extremity, without documented complications. Use it when a prior venous thrombosis has led to chronic venous changes, but the chart does not specify the limb.
Clinical signs
Typical findings include chronic leg or arm swelling, heaviness, pain, skin discoloration, and venous stasis changes after a past deep vein thrombosis. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents postthrombotic syndrome, post-phlebitic syndrome, or chronic venous sequelae after thrombosis, and does not name the affected extremity. Apply it only when the record supports a post-thrombotic cause and no complication is described.
Do not use for
Do not assign this code for acute DVT, nonspecific edema, or chronic venous insufficiency without a documented post-thrombotic origin. Check documentation if the limb is specified or if another venous disorder is named.
Coding tip
Confirm both the postthrombotic diagnosis and the absence of a specified extremity before coding I87.009.