I81 – Portal vein thrombosis
ICD-10-CM 2027 diagnosis code · Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
ICD-10-CM code
I81
- Code
I81(claims format:I81)- Description
- Portal vein thrombosis
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 9. Diseases of the circulatory system (I00-I99)
- Block
- I80-I89 Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
Notes for I81
Applicable to:
- Portal (vein) obstruction
Index terms for I81
Entries in the ICD-10-CM alphabetic index that lead to this code:
Frequently asked questions
What is ICD-10 code I81?
I81 is the ICD-10-CM code for portal vein thrombosis, in the block I80-I89 (Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified).
Is I81 a billable code?
Yes. I81 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.