ICD-10-CM Codes
I00-I99
I80-I89
I81-
2023 ICD-10-CM Diagnosis Code I81

2023 ICD-10-CM Diagnosis Code I81

Portal vein thrombosis

2016

2017

2018

2019

2020

2021

2022

2023

Billable/Specific Code

I81 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2023 edition of ICD-10-CM I81 became effective on October 1, 2022.
This is the American ICD-10-CM version of I81 - other international versions of ICD-10 I81 may differ.

Applicable To

Portal (vein) obstruction

Type 2 Excludes

Type 2 Excludes Help

A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (I81) and the excluded code together.

hepatic vein thrombosis (
ICD-10-CM Diagnosis Code I82.0
Budd-Chiari syndrome
Applicable To
- Hepatic vein thrombosis
I82.0
)
phlebitis of portal vein (
ICD-10-CM Diagnosis Code K75.1
Phlebitis of portal vein
Applicable To
- Pylephlebitis
Type 1 Excludes
- pylephlebitic liver abscess (K75.0)
K75.1
)

The following code(s) above I81 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to I81:

I00-I99
2023 ICD-10-CM Range I00-I99
Diseases of the circulatory system
Type 2 Excludes
- 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.-)
Diseases of the circulatory system

Approximate Synonyms

Thrombosis of portal vein

Clinical Information

A disorder characterized by the formation of a thrombus (blood clot) in the portal vein.
The formation of a blood clot (thrombus) in the portal vein.

ICD-10-CM I81 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):

441 Disorders of liver except malignancy, cirrhosis or alcoholic hepatitis with mcc
442 Disorders of liver except malignancy, cirrhosis or alcoholic hepatitis with cc
443 Disorders of liver except malignancy, cirrhosis or alcoholic hepatitis without cc/mcc

Convert I81 to ICD-9-CM

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change

Code annotations containing back-references to I81:

Type 2 Excludes: I82
, K76

ICD-10-CM Diagnosis Code I82
Other venous embolism and thrombosis
Code First
- venous embolism and thrombosis complicating:
- abortion, ectopic or molar pregnancy (O00-O07, O08.7)
- pregnancy, childbirth and the puerperium (O22.-, O87.-)
Type 2 Excludes
- venous embolism and thrombosis (of):
- cerebral (I63.6, I67.6)
- coronary (I21-I25)
- intracranial and intraspinal, septic or NOS (G08)
- intracranial, nonpyogenic (I67.6)
- intraspinal, nonpyogenic (G95.1)
- mesenteric (K55.0-)
- portal (I81)
- pulmonary (I26.-)
ICD-10-CM Diagnosis Code K76
Other diseases of liver
Type 2 Excludes
- alcoholic liver disease (K70.-)
- amyloid degeneration of liver (E85.-)
- cystic disease of liver (congenital) (Q44.6)
- hepatic vein thrombosis (I82.0)
- hepatomegaly NOS (R16.0)
- pigmentary cirrhosis (of liver) (E83.110)
- portal vein thrombosis (I81)
- toxic liver disease (K71.-)

Diagnosis Index entries containing back-references to I81:

Block, blocked
- portal I81 (vein)
Embolism (multiple) (paradoxical) I74.9
ICD-10-CM Diagnosis Code I74.9
Embolism and thrombosis of unspecified artery
- portal I81 (vein)
Obstruction, obstructed, obstructive
- portal I81 (circulation) (vein)
Pseudoangioma I81
Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel) I82.90
ICD-10-CM Diagnosis Code I82.90
Acute embolism and thrombosis of unspecified vein
Applicable To
Embolism of vein NOS
Thrombosis (vein) NOS
- liver (venous) I82.0
  ICD-10-CM Diagnosis Code I82.0
  Budd-Chiari syndrome
  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  Applicable To
  Hepatic vein thrombosis
  - portal vein I81
- portal I81

ICD-10-CM Codes Adjacent To I81

I80.253 …… bilateral

I80.259 Phlebitis and thrombophlebitis of unspecified calf muscular vein

I80.29 Phlebitis and thrombophlebitis of other deep vessels of lower extremities

I80.291 Phlebitis and thrombophlebitis of other deep vessels of right lower extremity

I80.292 Phlebitis and thrombophlebitis of other deep vessels of left lower extremity

I80.293 Phlebitis and thrombophlebitis of other deep vessels of lower extremity, bilateral

I80.299 Phlebitis and thrombophlebitis of other deep vessels of unspecified lower extremity

I80.3 Phlebitis and thrombophlebitis of lower extremities, unspecified

I80.8 Phlebitis and thrombophlebitis of other sites

I80.9 Phlebitis and thrombophlebitis of unspecified site

I81 Portal vein thrombosis

I82 Other venous embolism and thrombosis

I82.0 Budd-Chiari syndrome

I82.1 Thrombophlebitis migrans

I82.2 Embolism and thrombosis of vena cava and other thoracic veins

I82.21 Embolism and thrombosis of superior vena cava

I82.210 Acute embolism and thrombosis of superior vena cava

I82.211 Chronic embolism and thrombosis of superior vena cava

I82.22 Embolism and thrombosis of inferior vena cava

I82.220 Acute embolism and thrombosis of inferior vena cava

I82.221 Chronic embolism and thrombosis of inferior vena cava

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2023 ICD-10-CM Diagnosis Code I81

Portal vein thrombosis

Budd-Chiari syndrome

Phlebitis of portal vein

Diseases of the circulatory system

Other venous embolism and thrombosis

Other diseases of liver

Embolism and thrombosis of unspecified artery

Acute embolism and thrombosis of unspecified vein

Budd-Chiari syndrome