I81

Billable

ChapterI00–I99

Rankcategory

Official Description

Portal vein thrombosis

Metadata & Insights

•Billable/specific code (valid for reimbursement).
•Chapter 9: Diseases of the Circulatory System (I00-I99).

CH9 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)

certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
systemic connective tissue disorders (M30-M36)
transient cerebral ischemic attacks and related syndromes (G45.-)

Instructional Notes

Includes

Portal (vein) obstruction

Excludes2(Not included here. Code separately if applicable.)

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

Clinical Hierarchy

BillableHas subcodes

CH9Diseases of the circulatory system (I00-I99)

I80-I89Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89)

I81Portal vein thrombosisBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to I81:

chapterCH9

Diseases of the circulatory system (I00-I99)

View context instructions

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with MCC

Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with CC

Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis without CC/MCC

Cross Reference

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