Emergency: 119
AMDA-IMIC

I81 Portal vein thrombosis

Billable

Block: Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89)

Includes

  • Portal (vein) obstruction

Excludes 2 (not included here)

  • hepatic vein thrombosis (I82.0)
  • phlebitis of portal vein (K75.1)
✓
This category is a complete, billable diagnosis code.

No additional specificity is required — submit I81 directly on claims and documentation without a subcode extension.

Last reviewed: September 2026