I81
Billable codePortal vein thrombosis
The ICD-10 code for portal vein thrombosis is I81.
Clinical notes
Excludes2 (not included here)
An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Portal (vein) obstruction
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- I80Phlebitis and thrombophlebitisnon-billable header
- I82Other venous embolism and thrombosisnon-billable header
- I83Varicose veins of lower extremitiesnon-billable header
- I85Esophageal varicesnon-billable header
- I86Varicose veins of other sitesnon-billable header
- I87Other disorders of veinsnon-billable header
- I88Nonspecific lymphadenitisnon-billable header
- I89Other noninfective disorders of lymphatic vessels and lymph nodesnon-billable header
- I81Portal vein thrombosis
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 452
Associated MS-DRGs
I81 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.
- DRG 393Other Digestive System Diagnoses with MCC
- DRG 394Other Digestive System Diagnoses with CC
- DRG 395Other Digestive System Diagnoses without CC/MCC
- DRG 441Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with MCC
- DRG 442Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with CC
- DRG 443Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis without CC/MCC