I81
BillablePortal vein thrombosis
Portal vein thrombosis
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Portal (vein) obstruction
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •systemic connective tissue disordersM30-M36
- •transient cerebral ischemic attacks and related syndromesG45
- •hepatic vein thrombosisI82.0
- •phlebitis of portal veinK75.1
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(93)
SNOMED CT
- Deep vein thrombosis of portal vein17920008
- PVT - Portal vein thrombosis17920008
- Portal vein thrombosis17920008
- Hepatic portal vein obstruction57348003
- Portal vein obstruction57348003
- AMI - Acute mesenteric ischaemia91489000
- AMI - Acute mesenteric ischemia91489000
- Acute intestinal ischaemia91489000
- Acute intestinal ischaemic syndrome91489000
- Acute intestinal ischemia91489000
- Acute intestinal ischemic syndrome91489000
- Acute intestinal vascular insufficiency91489000
- Acute mesenteric ischaemia91489000
- Acute mesenteric ischemia91489000
- Acute vascular insufficiency of intestine91489000
- Thrombosis of mesenteric vein95446005
- Acute GIT vascular insufficiency266519001
- Acute gastrointestinal tract vascular insufficiency266519001
- Acute mesenteric venous occlusion721663007
- Acute occlusion of mesenteric vein721663007
- Obstruction of visceral vein723877000
- Acute ischaemia of colon due to mesenteric vein thrombosis344015141000119100
- Acute ischaemia of colon due to thrombosis of mesenteric vein344015141000119100
- Acute ischemia of colon due to mesenteric vein thrombosis344015141000119100
- Acute ischemia of colon due to thrombosis of mesenteric vein344015141000119100
- Acute thrombosis of mesenteric vein133421000119101
- Acute visceral ischaemia16415501000119100
- Acute visceral ischemia16415501000119100
- Chronic thrombosis of mesenteric vein133411000119108
- Visceral ischaemia153821000119103
- Visceral ischemia153821000119103
UMLS
- Blood clot in portal veinC0155773
- Deep vein thrombosis of portal veinC0155773
- PVT - Portal vein thrombosisC0155773
- Portal Vein ThrombosisC0155773
- Portal vein thrombosisC0155773
- Portal vein thrombosis (disorder)C0155773
- PylethrombosisC0155773
- Thrombosis of the portal veinC0155773
- Thrombosis portal veinC0155773
- portal thrombosisC0155773
- portal thrombosis veinC0155773
- portal vein thrombosisC0155773
- pylethrombosisC0155773
- thrombosis portal veinC0155773
- Hepatic portal vein obstructionC0265029
- Portal (vein) obstructionC0265029
- Portal vein obstructionC0265029
- Portal vein obstruction (disorder)C0265029
- Portal vein occlusionC0265029
- portal obstructionC0265029
- portal vein obstructionC0265029
Clinical Terms
- Portal vein occlusion
- portal thrombosis
- AMI - Acute mesenteric ischemia
- Pylethrombosis
- AMI - Acute mesenteric ischaemia
- Portal vein obstruction
- Acute intestinal ischemia
- Acute intestinal ischaemic syndrome
- Acute occlusion of mesenteric vein
- Thrombosis of mesenteric vein
- Portal vein thrombosis (disorder)
- Deep vein thrombosis of portal vein
- Portal (vein) obstruction
- Acute intestinal vascular insufficiency
- Chronic thrombosis of mesenteric vein
- Acute gastrointestinal tract vascular insufficiency
- Obstruction of visceral vein
- Acute intestinal ischaemia
- Acute ischaemia of colon due to mesenteric vein thrombosis
- Visceral ischaemia
- Thrombosis of the portal vein
- Acute mesenteric ischaemia
- Acute ischaemia of colon due to thrombosis of mesenteric vein
- Acute GIT vascular insufficiency
- portal obstruction
- Acute intestinal ischemic syndrome
- Acute vascular insufficiency of intestine
- portal thrombosis vein
- Acute visceral ischaemia
- Acute visceral ischemia
- Portal vein obstruction (disorder)
- Acute mesenteric ischemia
- Visceral ischemia
- Acute ischemia of colon due to thrombosis of mesenteric vein
- Acute mesenteric venous occlusion
- Acute thrombosis of mesenteric vein
- PVT - Portal vein thrombosis
- Thrombosis portal vein
- Hepatic portal vein obstruction
- Blood clot in portal vein
- Acute ischemia of colon due to mesenteric vein thrombosis
Frequently Asked Questions
What is the ICD-10 code for portal vein thrombosis?
The ICD-10-CM code for portal vein thrombosis is I81. The full clinical description is "Portal vein thrombosis". I81 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code I81 mean?
ICD-10-CM code I81 represents “Portal vein thrombosis”. It is classified under Chapter 9: Diseases of the Circulatory System and is a billable/specific code that can be used on a claim.
Is I81 a billable code?
Yes, I81 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is I81 in?
I81 is in Chapter 9: Diseases of the Circulatory System (codes I00-I99).
What SNOMED CT codes does I81 map to?
I81 maps to 12 SNOMED CT concepts: 91489000, 266519001, 344015141000119100, 721663007, 133421000119101, and 7 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for I81?
I81 is linked to 2 UMLS Concept Unique Identifiers: C0155773, C0265029. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does I81 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like portal vein thrombosis affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of I81?
I81 maps to the ICD-11 code: DB98.3 (Portal vein thrombosis).
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.