I81

Billable

Portal vein thrombosis

I81 is the ICD-10-CM code for Portal vein thrombosis. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
I00-I99
Edition
FY2026

I00-I99 Diseases of the circulatory system

Includes

  • Portal (vein) obstruction

Excludes2 — not included here

  • hepatic vein thrombosis (I82.0)
  • phlebitis of portal vein (K75.1)

Frequently asked questions

What is ICD-10 code I81?
I81 is the ICD-10-CM code for "Portal vein thrombosis". It falls under I00-I99 Diseases of the circulatory system.
Is I81 a billable code?
Yes — I81 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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