I81 is the ICD-10 code for Portal vein thrombosis. It is a three-character category that is not subdivided further. It belongs to the block I80–I89 (Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified) in Chapter IX, Diseases of the circulatory system.
- Code type
- Category (3 characters)
- Chapter
- IX · I00–I99
- Classification
- WHO ICD-10, 2019 version
What I81 includes
Conditions and terms that are coded here.
- Portal (vein) obstruction
What I81 excludes
Conditions that look similar but belong under another code.
- phlebitis of portal vein K75.1
I81 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
I81Portvenetrombose
DI81Trombose i portåren
- DI819Trombose i vena porta
I81Porttilaskimon tukos
I81Pfortaderthrombose
I81Thrombose de la veine porte
I81trombose van vena portae
I81Portal vein thrombosis
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
Look up another code
Stop looking codes up by hand
Docdemic listens to the consultation, writes the note and suggests the diagnosis and procedure codes that fit it, each one checked against your country’s official code list.
Try Docdemic free