What is ICD-10 code I82.0?

I82.0 is the ICD-10-CM diagnosis code for Budd-Chiari syndrome. A rare condition where blood clots form in the hepatic veins that drain blood from the liver, causing liver congestion and potential liver failure. It belongs to the ICD-10-CM chapter for diseases of the circulatory system (i00-i99). I82.0 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. I82.0 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. I82.0 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. I82.0 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

What is the V28 vs V24 difference for I82.0?

CMS phased in the V28 risk adjustment model over payment years 2024 (33%), 2025 (67%), and 2026 (100%), replacing V24. V28 consolidates HCC categories, removes some lower-acuity conditions, and recalibrates RAF weights across the entire model. For I82.0, V28 maps to Deep Vein Thrombosis and Pulmonary Embolism at RAF 0.294 while V24 mapped to Vascular Disease at RAF 0.288. Both models can still appear in legacy data and in payer-specific lookback periods.

What should coders know when reporting I82.0?

This is a serious condition; ensure documentation includes any associated symptoms such as abdominal pain, ascites, or hepatomegaly Investigate and document underlying causes such as myeloproliferative disorders, malignancy, or thrombophilia Because I82.0 maps to a payment HCC, the documentation must also satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's risk adjustment score.

2026 ICD-10-CM I82.0: Budd-Chiari syndrome

ICD-10-CM Code View

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Code lookupI82.0Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the circulatory system (I00-I99) / Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89)

I82.0

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Budd-Chiari syndrome

A rare condition where blood clots form in the hepatic veins that drain blood from the liver, causing liver congestion and potential liver failure.

Buddy Insight

Budd-Chiari syndrome is a rare but life-threatening condition caused by hepatic vein thrombosis that leads to hepatic congestion, portal hypertension, and potential liver failure.

CMS-HCC V28

Mapped

HCC 267

Deep Vein Thrombosis and Pulm...

RAF 0.294

CMS-HCC V24

Mapped

HCC 108

Vascular Disease

RAF 0.288

ACA/HHS

Mapped

HCC 156

HHS-HCC 156

Varies by metal level

ESRD/PACE

Mapped

HCC 108

Vascular Disease

RAF 0.073

RXHCC

Mapped

HCC 215

Pulmonary Embolism and Other ...

RAF 0.228

Code Book Path

Official

I82Other venous embolism and thrombosis

I82.0Budd-Chiari syndrome

Inclusion Terms

Official

Hepatic vein thrombosis

Excludes 2

Official

venous embolism and thrombosis (of):
cerebral (I63.6, I67.6)
coronary (I21-I25)
intracranial and intraspinal, septic or NOS (G08)
intracranial, nonpyogenic (I67.6)

Related Child Codes

Official

I82.1Thrombophlebitis migrans

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

I82.3Embolism and thrombosis of renal vein

I82.4Acute embolism and thrombosis of deep veins of lower extremity

I82.5Chronic embolism and thrombosis of deep veins of lower extremity

Includes

Official

ICD-10-CM does not list Includes notes for I82.0 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for I82.0 in this effective period.

Code First

Official

venous embolism and thrombosis complicating:
abortion, ectopic or molar pregnancy (O00-O07, O08.7)
pregnancy, childbirth and the puerperium (O22.-, O87.-)

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for I82.0 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for I82.0 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Clinical diagnosis of Budd-Chiari syndrome documented by hepatologist or treating provider

Imaging confirmation (Doppler ultrasound, CT, MRI, or venography) showing hepatic vein obstruction

Documentation of underlying etiology (myeloproliferative disorder, hypercoagulable state, malignancy, etc.)

Evidence of hepatic complications such as ascites, hepatomegaly, or liver function abnormalities

MEAT Support

HCC Buddy guidance

Clinical diagnosis of Budd-Chiari syndrome documented by hepatologist or treating provider

Imaging confirmation (Doppler ultrasound, CT, MRI, or venography) showing hepatic vein obstruction

Documentation of underlying etiology (myeloproliferative disorder, hypercoagulable state, malignancy, etc.)

Evidence of hepatic complications such as ascites, hepatomegaly, or liver function abnormalities

Audit Caution

HCC Buddy guidance

Confusing Budd-Chiari syndrome with hepatic veno-occlusive disease (sinusoidal obstruction syndrome); these are distinct conditions with different pathophysiology

Failing to code associated complications separately, such as portal hypertension, ascites, or hepatic failure

Not documenting the underlying etiology which is essential for complete coding

Common Mistakes

HCC Buddy guidance

K76.5 — Hepatic veno-occlusive disease; involves sinusoidal obstruction syndrome rather than hepatic vein thrombosis

I81 — Portal vein thrombosis; involves the portal vein rather than the hepatic veins

I82.210/I82.211 — Superior vena cava thrombosis; involves SVC rather than hepatic veins

K72.0x — Acute and subacute hepatic failure; may be a complication of Budd-Chiari but is coded separately

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is I82.0 an HCC code?

Yes. I82.0 (Budd-Chiari syndrome) maps to Deep Vein Thrombosis and Pulmonary Embolism under the CMS-HCC V28 risk adjustment model (and Vascular Disease under V24), with a community non-dual aged RAF of 0.294. It is billable for payment year 2026.

Coder answer: I82.0 is billable and maps to V28 HCC 267, Deep Vein Thrombosis and Pulmonary Embolism. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code: I82.0
Description: Budd-Chiari syndrome
HCC (V28): HCC 267 — Deep Vein Thrombosis and Pulmonary Embolism
RAF: 0.294
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 267, Deep Vein Thrombosis and Pulmonary Embolism

0.294

V24HCC 108, Vascular Disease

0.288

ESRDHCC 108, Vascular Disease

0.073

RxHCCHCC 215, Pulmonary Embolism and Other Vascular Disease

0.228

Each model's RAF is its CMS base weight for that model's standard population, so weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.

Work I82.0 in the Code Book — tabular path, V28 RAF, and MEAT checklist →

MEAT Criteria for I82.0

For I82.0 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.

MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
EEvaluate: test results, medication response, or physical findings reviewed by the provider
AAssess: explicit mention in the assessment or plan with acknowledgment of status
TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed I82.0 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

I82.0 is the ICD-10-CM diagnosis code for budd-chiari syndrome. A rare condition where blood clots form in the hepatic veins that drain blood from the liver, causing liver congestion and potential liver failure. I82.0 sits in the ICD-10-CM chapter for diseases of the circulatory system (i00-i99), within the section covering diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (i80-i89).

Under the CMS-HCC V28 risk adjustment model, I82.0 maps to Deep Vein Thrombosis and Pulmonary Embolism (HCC 267) with a community, non-dual, aged base RAF weight of 0.294. Under the older CMS-HCC V24 model, I82.0 maps to Vascular Disease (HCC 108) with a community, non-dual, aged base RAF weight of 0.288. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.

This is a serious condition; ensure documentation includes any associated symptoms such as abdominal pain, ascites, or hepatomegaly. Because I82.0 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for I82.0 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•This is a serious condition; ensure documentation includes any associated symptoms such as abdominal pain, ascites, or hepatomegaly
•Investigate and document underlying causes such as myeloproliferative disorders, malignancy, or thrombophilia

Clinical Significance

Budd-Chiari syndrome is a rare but life-threatening condition caused by hepatic vein thrombosis that leads to hepatic congestion, portal hypertension, and potential liver failure. It carries significant implications for risk adjustment as it reflects severe vascular disease requiring ongoing specialist management, anticoagulation, and potentially liver transplant evaluation. Accurate capture ensures appropriate resource allocation for these medically complex patients.

Documentation Requirements

✓Clinical diagnosis of Budd-Chiari syndrome documented by hepatologist or treating provider
✓Imaging confirmation (Doppler ultrasound, CT, MRI, or venography) showing hepatic vein obstruction
✓Documentation of underlying etiology (myeloproliferative disorder, hypercoagulable state, malignancy, etc.)
✓Evidence of hepatic complications such as ascites, hepatomegaly, or liver function abnormalities
✓Current treatment plan including anticoagulation, diuretics, or consideration for TIPS or transplant

Commonly Confused Codes

•K76.5: Hepatic veno-occlusive disease; involves sinusoidal obstruction syndrome rather than hepatic vein thrombosis
•I81: Portal vein thrombosis; involves the portal vein rather than the hepatic veins
•I82.210/I82.211: Superior vena cava thrombosis; involves SVC rather than hepatic veins
•K72.0x: Acute and subacute hepatic failure; may be a complication of Budd-Chiari but is coded separately
•I82.890/I82.891: Embolism and thrombosis of other specified veins; use for venous thrombosis not classified elsewhere