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

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for I82.0 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on I82.0 itself; “inherited from” names the category or block whose note applies here.

Coder workflow for I82.0

MedCoder structured workflow — derived from this code’s own official record

Choose the right path

1. Is the underlying (etiologic) condition the Code First note names documented?
   Yes → Sequence the underlying condition first, then I82.0.
   No → Continue; do not add an underlying condition the record does not document.

   ReviewO08.7, O22, O87

Consider I82.0. Then confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement

Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).

The underlying (etiologic) condition

Named in the Code First note; sequenced before this code when documented (Guidelines I.A.13).

Official instructions as workflow

• Excludes2 — not part of I82.0(9 notes)

  Coding workflow: The conditions named in this note are not included in I82.0. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

  CompareI63.6, I67.6, G08, G95.1, K55.0, I81

  See the official tabular notes · Guidelines I.A.12.b

• Code First — sequencing check(3 notes)

  Coding workflow: Check whether the underlying or etiologic condition the note names is documented. When it is, sequence it before I82.0. Do not add an underlying condition the record does not document.

  ReviewO08.7, O22, O87

  See the official tabular notes · Guidelines I.A.13

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Indexed Clinical Terms (9)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

• Block, blocked, hepatic vein
• Budd-Chiari syndrome (hepatic vein thrombosis)
• Chiari's, disease or syndrome (hepatic vein thrombosis)
• Disease, diseased, Chiari's (hepatic vein thrombosis)
• Embolism (multiple) (paradoxical), hepatic (vein)
• Syndrome, Budd-Chiari
• Syndrome, Chiari's (hepatic vein thrombosis)
• Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel), hepatic (vein)
• Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel), liver (venous)

Don’t confuse I82.0 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of I82.0 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

• I63.6— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of cerebral adds I63.6; it is not part of this code and both may be reported when both are documented.

  Full comparison: I82.0 vs I63.6 →

• I67.6— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of cerebral adds I67.6; it is not part of this code and both may be reported when both are documented.

  Full comparison: I82.0 vs I67.6 →

• I21— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of coronary adds I21; it is not part of this code and both may be reported when both are documented.

  Full comparison: I82.0 vs I21 →

• I25— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of coronary adds I25; it is not part of this code and both may be reported when both are documented.

  Full comparison: I82.0 vs I25 →

• G08— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of intracranial and intraspinal, septic or NOS adds G08; it is not part of this code and both may be reported when both are documented.

  Full comparison: I82.0 vs G08 →

• G95.1— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of intraspinal, nonpyogenic adds G95.1; it is not part of this code and both may be reported when both are documented.

  Full comparison: I82.0 vs G95.1 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Verify Before Coding

• MCC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name I82.0 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 1 Excludes1 note: K76.5 — Hepatic veno-occlusive disease.

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 3 Excludes2 notes across 2 chapters: I81 — Portal vein thrombosis, K71 — Toxic liver disease, K76 — Other diseases of liver.

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: MCC — Major Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 202 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 3 MS-DRGs: DRG 441 (MDC 07), DRG 442 (MDC 07), DRG 443 (MDC 07).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):CIR033 — Acute phlebitis; thrombophlebitis and thromboembolism (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical process (MS-DRG)

Acts as MCC — raises the severity of other admissions. CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

E13.628 — Other specified diabetes mellitus with other skin complications, E13.630 — Other specified diabetes mellitus with periodontal disease, E13.638 — Other specified diabetes mellitus with other oral complications, E13.649 — Other specified diabetes mellitus with hypoglycemia without coma, E13.65 — Other specified diabetes mellitus with hyperglycemia, E13.69 — Other specified diabetes mellitus with other specified complication, E13.8 — Other specified diabetes mellitus with unspecified complications, I27.841 — Fontan-associated lymphatic dysfunction, I27.848 — Other Fontan-associated condition, I27.849 — Fontan related circulation, unspecified, I82.210 — Acute embolism and thrombosis of superior vena cava, I82.211 — Chronic embolism and thrombosis of superior vena cava, I82.290 — Acute embolism and thrombosis of other thoracic veins, I82.291 — Chronic embolism and thrombosis of other thoracic veins, I82.401 — Acute embolism and thrombosis of unspecified deep veins of right lower extremity, I82.402 — Acute embolism and thrombosis of unspecified deep veins of left lower extremity, I82.403 — Acute embolism and thrombosis of unspecified deep veins of lower extremity, bilateral, I82.409 — Acute embolism and thrombosis of unspecified deep veins of unspecified lower extremity, I82.411 — Acute embolism and thrombosis of right femoral vein, I82.412 — Acute embolism and thrombosis of left femoral vein, +181 more

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Deep Vein Thrombosis and Pulmonary Embolism) for risk-adjusted payment.

I80.243 — Phlebitis and thrombophlebitis of peroneal vein, bilateral, I80.249 — Phlebitis and thrombophlebitis of unspecified peroneal vein, I80.251 — Phlebitis and thrombophlebitis of right calf muscular vein, I80.252 — Phlebitis and thrombophlebitis of left calf muscular vein, I80.253 — Phlebitis and thrombophlebitis of calf muscular vein, bilateral, I80.259 — Phlebitis and thrombophlebitis of unspecified calf muscular vein, 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, I82.210 — Acute embolism and thrombosis of superior vena cava, I82.211 — Chronic embolism and thrombosis of superior vena cava, I82.220 — Acute embolism and thrombosis of inferior vena cava, I82.221 — Chronic embolism and thrombosis of inferior vena cava, I82.290 — Acute embolism and thrombosis of other thoracic veins, I82.291 — Chronic embolism and thrombosis of other thoracic veins, I82.3 — Embolism and thrombosis of renal vein, I82.401 — Acute embolism and thrombosis of unspecified deep veins of right lower extremity, I82.402 — Acute embolism and thrombosis of unspecified deep veins of left lower extremity, I82.403 — Acute embolism and thrombosis of unspecified deep veins of lower extremity, bilateral, +146 more

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Acute phlebitis; thrombophlebitis and thromboembolism).

I80.253 — Phlebitis and thrombophlebitis of calf muscular vein, bilateral, I80.259 — Phlebitis and thrombophlebitis of unspecified calf muscular vein, 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, I82.1 — Thrombophlebitis migrans, I82.210 — Acute embolism and thrombosis of superior vena cava, I82.220 — Acute embolism and thrombosis of inferior vena cava, I82.290 — Acute embolism and thrombosis of other thoracic veins, I82.3 — Embolism and thrombosis of renal vein, I82.401 — Acute embolism and thrombosis of unspecified deep veins of right lower extremity, I82.402 — Acute embolism and thrombosis of unspecified deep veins of left lower extremity, I82.403 — Acute embolism and thrombosis of unspecified deep veins of lower extremity, bilateral, I82.409 — Acute embolism and thrombosis of unspecified deep veins of unspecified lower extremity, I82.411 — Acute embolism and thrombosis of right femoral vein, +106 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main terms “Embolism”, “Block, blocked”, “Thrombosis, thrombotic”; these codes share that main term but sit in a different category of the Tabular List.

I74.19 — Embolism and thrombosis of other parts of aorta (aorta, aortic, specified site NEC), I74.2 — Embolism and thrombosis of arteries of the upper extremities (upper extremity), I74.3 — Embolism and thrombosis of arteries of the lower extremities (popliteal), I74.4 — Embolism and thrombosis of arteries of extremities, unspecified (artery, limb), I74.5 — Embolism and thrombosis of iliac artery (artery, iliac), I74.8 — Embolism and thrombosis of other arteries (spleen, splenic), I74.9 — Embolism and thrombosis of unspecified artery, I76 — Septic arterial embolism (pyemic), I78.8 — Other diseases of capillaries (capillary), I81 — Portal vein thrombosis (portal), J13 — Pneumonia due to Streptococcus pneumoniae (pyemic, pneumococcal, with pneumonia), J84.10 — Pulmonary fibrosis, unspecified (alveolocapillary), K55.0 — Acute vascular disorders of intestine (mesenteric, vein), K55.039 — Acute (reversible) ischemia of large intestine, extent unspecified (intestine), K55.059 — Acute (reversible) ischemia of intestine, part and extent unspecified (mesenteric), K55.069 — Acute infarction of intestine, part and extent unspecified (omentum), K64.5 — Perianal venous thrombosis (anal), N28.0 — Ischemia and infarction of kidney (renal), N28.9 — Disorder of kidney and ureter, unspecified (kidney), N48.81 — Thrombosis of superficial vein of penis (penis), +116 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Gamma-glutamyl Transferase (GGT) Test, Partial Thromboplastin Time (PTT) Test, Prothrombin Time Test and INR (PT/INR)

Contextual Map

Every relationship of I82.0 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run I82.0 with these 4 related codes in Claim Check

Hierarchy

• I00-I99 — Chapter 9: Diseases of the Circulatory System (I00-I99) (I00-I99)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I80-I89 — Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Referenced by Excludes1 notes

• K76.5 — Hepatic veno-occlusive disease[Excludes1]: “Budd-Chiari syndrome (I82.0)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Excludes2 notes

• I81 — Portal vein thrombosis[Excludes2]: “hepatic vein thrombosis (I82.0)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• K71 — Toxic liver disease[Excludes2]: “Budd-Chiari syndrome (I82.0)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026
• K76 — Other diseases of liver[Excludes2]: “hepatic vein thrombosis (I82.0)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Clinical classification (CCSR)

• CIR033 — Acute phlebitis; thrombophlebitis and thromboembolism[CCSR]— AHRQ CCSR for ICD-10-CM Diagnoses (HCUP)

Risk adjustment (CMS-HCC)

• HCC 267 — Deep Vein Thrombosis and Pulmonary Embolism [CMS-HCC]— CMS-HCC V28 · 2026

MS-DRG Grouper

• MCC — Major Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (MCC).”— CMS MS-DRG Definitions Manual (Appendix C) · FY2026
• DRG 441 — DISORDERS OF LIVER EXCEPT MALIGNANCY, CIRRHOSIS OR ALCOHOLIC HEPATITIS WITH MCC[MS-DRG]: “DISORDERS OF LIVER EXCEPT MALIGNANCY, CIRRHOSIS OR ALCOHOLIC HEPATITIS WITH MCC (MDC 07)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 442 — DISORDERS OF LIVER EXCEPT MALIGNANCY, CIRRHOSIS OR ALCOHOLIC HEPATITIS WITH CC[MS-DRG]: “DISORDERS OF LIVER EXCEPT MALIGNANCY, CIRRHOSIS OR ALCOHOLIC HEPATITIS WITH CC (MDC 07)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 443 — DISORDERS OF LIVER EXCEPT MALIGNANCY, CIRRHOSIS OR ALCOHOLIC HEPATITIS WITHOUT CC/MCC[MS-DRG]: “DISORDERS OF LIVER EXCEPT MALIGNANCY, CIRRHOSIS OR ALCOHOLIC HEPATITIS WITHOUT CC/MCC (MDC 07)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026

MDC crossing

• MDC 07 — Diseases and Disorders of the Hepatobiliary System and Pancreas[MDC crossing]: “Diseases and Disorders of the Hepatobiliary System and Pancreas — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 2,481 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries (9)

• Block, blocked, hepatic vein[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Budd-Chiari syndrome (hepatic vein thrombosis)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Chiari's, disease or syndrome (hepatic vein thrombosis)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Disease, diseased, Chiari's (hepatic vein thrombosis)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Embolism (multiple) (paradoxical), hepatic (vein)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Syndrome, Budd-Chiari[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Syndrome, Chiari's (hepatic vein thrombosis)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Thrombosis, thrombotic (bland) (multiple) (progressive) (silent) (vessel), hepatic (vein)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• and 1 more

Nearest codes (40)

• I82 — Other venous embolism and thrombosis[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I82.1 — Thrombophlebitis migrans[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I82.2 — Embolism and thrombosis of vena cava and other thoracic veins[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I82.21 — Embolism and thrombosis of superior vena cava[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I82.210 — Acute embolism and thrombosis of superior vena cava[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I82.211 — Chronic embolism and thrombosis of superior vena cava[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I82.22 — Embolism and thrombosis of inferior vena cava[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• I82.220 — Acute embolism and thrombosis of inferior vena cava[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• and 32 more

Change history

• FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data

CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page

Claim edits Official source data

CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page

Inpatient payment groups Official source data

CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page

Risk adjustment Official source data

2026 Mid-Year Final ICD-10 Mappings + Model Software (cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip, 2026-midyear-final-model-software.zip) — CMS-HCC V28, PY2026 mid-year final release Release, file and checksum · Publisher’s page

Change history and date-of-service validity Official source data

CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page

Comparisons, relationships and the contextual map MedCoder structured relationship

Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears

Summary and FAQ answers MedCoder explanation

Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Nearest Codes in This Family

Official ICD-10-CM classifications closest to I82.0 in its code family, with their registry titles.

• I82 — Other venous embolism and thrombosis
• 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
• I82.29 — Embolism and thrombosis of other thoracic veins

View all codes in the I82 family