2027 ICD-10-CM Diagnosis Code I82.0Budd-Chiari syndrome
ICD-10-CM Codes›I00–I99›I80-I89›I82
- Billable — Valid for Submission
- MCC — Major Complication or Comorbidity
- Risk Adjusts — HCC 267
- Not Chronic
I82.0 is a billable ICD-10-CM diagnosis code for Budd-Chiari syndrome. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 441 through 443. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 202 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acute phlebitis; thrombophlebitis and thromboembolism.
For Medicare Advantage risk adjustment, I82.0 maps to CMS-HCC Category 267 (Deep Vein Thrombosis and Pulmonary Embolism) under the V28 model, adding a risk factor of about 0.294 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
I82.0 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Budd-Chiari syndrome
- Hepatic vein thrombosis
- Obstruction of visceral vein
- Visceral venous thrombosis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to I82.0: its own notes plus those printed at I82 and Chapter 9. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Hepatic vein thrombosis
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- 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.-)
Code First
The underlying condition named in the note is sequenced before this code.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name I82.0, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming I82.0: they are not reported together with it, unless the two conditions are unrelated.
- K76.5 Hepatic veno-occlusive diseaseBudd-Chiari syndrome (I82.0)
Excludes2 3
These codes carry an Excludes2 note naming I82.0: its condition is not part of those codes, and both may be reported when the patient has both.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
hepatic vein I82.0
Disease, diseased See Also: Syndrome;
Syndrome See Also: Disease;
Budd-Chiari I82.0
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Budd-Chiari Syndrome
a condition in which the hepatic venous outflow is obstructed anywhere from the small hepatic veins to the junction of the inferior vena cava and the right atrium. usually the blockage is extrahepatic and caused by blood clots (thrombus) or fibrous webs. parenchymal fibrosis is uncommon.
Patient EducationClinical
Liver Diseases
Your liver is the largest organ inside your body. It helps your body digest food, store energy, and remove poisons.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert I82.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I82.0Overview
What is the ICD-10 code for Budd-Chiari syndrome?
The ICD-10-CM code for Budd-Chiari syndrome is I82.0 (sometimes written as I820). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is I82.0 (Other venous embolism and thrombosis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report Budd-Chiari syndrome on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does I82.0 group to?
When Budd-Chiari syndrome is the principal diagnosis on an inpatient stay, it groups to MS-DRG 442, 441, 443, with relative weights from 0.6890 to 1.8226 depending on complications. Higher weights mean higher Medicare reimbursement.
Is I82.0 a CC or MCC?
CMS lists I82.0 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 202 closely related codes in its exclusion list.
What is coded first with I82.0?
The Code First note at I82, which applies to I82.0, reads: venous embolism and thrombosis complicating: abortion, ectopic or molar pregnancy (O00-O07, O08.7); pregnancy, childbirth and the puerperium (O22.-, O87.-). When one of these applies, it is sequenced before I82.0.
What HCC is I82.0?
I82.0 (Budd-Chiari syndrome) maps to CMS-HCC Category 267 (Deep Vein Thrombosis and Pulmonary Embolism), commonly written as HCC 267, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 108 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. In the Part D prescription drug model it maps to RxHCC 215.
Does I82.0 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, I82.0 adds a risk adjustment factor of about 0.294 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.245 to 0.568 depending on the payment segment). HCC 267 sits at the top of its hierarchy, so no other condition category supersedes it. See the full factor table on the HCC 267 category page.
