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ICD-10-CM 2027

ICD-10 code for Pseudoangioma

I81

Portal vein thrombosis

From the official ICD-10-CM alphabetic index entry “Pseudoangioma”. Page updated September 29, 2026.

About coding Pseudoangioma

The ICD-10-CM code for Pseudoangioma is I81 (Portal vein thrombosis).

The conditions in its Excludes2 note aren't part of I81, but may be coded alongside it if the patient has both: hepatic vein thrombosis (I82.0) and phlebitis of portal vein (K75.1).

As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 441 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with MCC, relative weight 1.8219), DRG 442 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis with CC, relative weight 0.9602) and DRG 443 (Disorders of Liver Except Malignancy, Cirrhosis or Alcoholic Hepatitis without CC/MCC, relative weight 0.6885), in MDC 07 (Diseases and Disorders of the Hepatobiliary System and Pancreas), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

Common questions about Pseudoangioma ICD-10 codes

What is the ICD-10 code for Pseudoangioma?

I81 — Portal vein thrombosis.

Is I81 billable?

Yes. I81 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can I81 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict I81 as a principal diagnosis.

Is I81 a CC or MCC?

I81 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.