ICD-10 Code I87.00 – Postthrombotic syndrome without complications (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I87.00 – Postthrombotic syndrome without complications
What it is
Postthrombotic syndrome is a chronic venous condition that develops after a prior deep vein thrombosis. This code describes the syndrome when no complication is documented.
Clinical signs
Typical findings include leg swelling, aching, heaviness, skin discoloration, and venous stasis changes in the affected limb. Clinical features vary; refer to documentation.
When to use this code
Use I87.00 when the record clearly documents postthrombotic syndrome or post-phlebitic syndrome as the diagnosis. Apply it for chronic sequelae after thrombosis when the provider does not describe an acute clot or a separate complication.
Confirm that the condition is not being coded as an active DVT, venous insufficiency without postthrombotic syndrome, or another specified venous disorder. Check documentation if the relationship to prior thrombosis is unclear.
Do not use for
Do not use this code for acute deep vein thrombosis, superficial thrombophlebitis, or uncomplicated varicose veins. If the chart does not support postthrombotic syndrome, check documentation.
Coding tip
Link the diagnosis to prior thrombosis only when the provider documents that relationship.