2027 ICD-10-CM Diagnosis Code I82.220Acute embolism and thrombosis of inferior vena cava
ICD-10-CM Codes›I00–I99›I80-I89›I82
- Billable — Valid for Submission
- MCC — Major Complication or Comorbidity
- Risk Adjusts — HCC 267
- Not Chronic
I82.220 is a billable ICD-10-CM diagnosis code for acute embolism and thrombosis of inferior vena cava. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 299 through 301, 791, 793. 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 203 closely related codes. Coders also document this condition as acquired abnormality of inferior vena cava. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acute phlebitis; thrombophlebitis and thromboembolism.
For Medicare Advantage risk adjustment, I82.220 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
I82.220 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.
- Acquired abnormality of inferior vena cava
- Acquired occlusion of inferior vena cava
- Acute thrombosis of inferior vena cava
- Obstruction of inferior vena cava
- Occlusion of inferior vena cava
- Thrombosis of inferior vena cava
- Thrombosis of vena cava
- Tumor thrombus of inferior vena cava
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to I82.220: 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.
- Embolism and thrombosis of inferior vena cava NOS
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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Convert I82.220 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I82.220Overview
What is the ICD-10 code for acute embolism and thrombosis of inferior vena cava?
The ICD-10-CM code for acute embolism and thrombosis of inferior vena cava is I82.220 (sometimes written as I82220). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is I82.220 (Embolism and thrombosis of inferior vena cava) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report acute embolism and thrombosis of inferior vena cava on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does I82.220 group to?
When acute embolism and thrombosis of inferior vena cava is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 301, 300, 299, with relative weights from 0.7132 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is I82.220 a CC or MCC?
CMS lists I82.220 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 203 closely related codes in its exclusion list.
What is coded first with I82.220?
The Code First note at I82, which applies to I82.220, 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 I82.220.
What HCC is I82.220?
I82.220 (acute embolism and thrombosis of inferior vena cava) 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 I82.220 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, I82.220 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.
