Current

I81 — Portal vein thrombosis

Part of Chapter 9: Diseases of the circulatory system , block Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89) .

Official Notes

Inclusion Terms

Portal (vein) obstruction

Excludes2

hepatic vein thrombosis ( I82.0 )

Excludes2

phlebitis of portal vein ( K75.1 )

Child Codes

I81 has no child codes in the FY 2027 release -- it is used on its own.

Referenced By

Official notes on these codes cite I81.

FY 2027 effective October 1, 2026 · CDC NCHS and CMS