2026 ICD-10-CM Diagnosis Code I77.4Celiac artery compression syndrome

ICD-10-CM Codes›I00–I99›I70-I79›I77

ICD-10-CM I77.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I77.4 is a billable ICD-10-CM diagnosis code for celiac artery compression syndrome. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 391 through 392. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 1 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified circulatory disease.

I77.4 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 108 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 108, ESRD (V21) category 108, and ESRD (V24) category 108 for payment year 2026.

Code Identity

ICD-10-CM Code
I77.4
Billable Status
Yes — Valid for Submission
Code Describes
Celiac artery compression syndrome
Short Description
Celiac artery compression syndrome
Same as the full description in the CMS dataset.
Parent Code
I77
Other disorders of arteries and arterioles

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI70-I79Diseases of arteries, arterioles and capillaries
CategoryI77Other disorders of arteries and arterioles
This CodeI77.4Celiac artery compression syndrome

Medicare Risk Adjustment (HCC)Billing

I77.4 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.

CMS-HCC V28 (Medicare Advantage Payment Model)
Not mapped
Dropped in V28 see all codes that no longer risk-adjust
Prior Model (CMS-HCC V24)
HCC 108
V24 retired last contributed to a Medicare Advantage risk score in payment year 2025
Other CMS Models
PACE (CMS-HCC V22): HCC 108 · ESRD (V21): HCC 108 · ESRD (V24): HCC 108
ESRD V21 weights: 0.065 dialysis, 0.086–0.271 functioning graft · ESRD V24 weights: 0.073 dialysis, 0.074–0.287 functioning graft
Part D (RxHCC)
Not mapped
I77.4 does not risk-adjust in the RxHCC prescription drug model

Source: CMS Payment Year 2026 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.

  • Celiac artery compression syndrome
  • Entrapment of blood vessel
  • Extrinsic compression of artery
  • Stenosis of celiac artery

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.

CCSR CIR032
Other specified and unspecified circulatory disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert I77.4 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
447.4 Celiac art compress syn
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I77.4Overview

What is the ICD-10 code for celiac artery compression syndrome?

The ICD-10-CM code for celiac artery compression syndrome is I77.4 (sometimes written as I774). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is I77.4 (Other disorders of arteries and arterioles) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report celiac artery compression syndrome on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does I77.4 group to?

When celiac artery compression syndrome is the principal diagnosis on an inpatient stay, it groups to MS-DRG 391, 392, with relative weights from 0.7796 to 1.2683 depending on complications. Higher weights mean higher Medicare reimbursement.

Is I77.4 a CC or MCC?

CMS lists I77.4 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 1 closely related codes in its exclusion list.

What is the ICD-9 equivalent of I77.4?

Under the General Equivalence Mappings, celiac artery compression syndrome converts to ICD-9-CM 447.4 (celiac art compress syn). The mapping is a direct match.

Does I77.4 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage. I77.4 mapped to HCC 108 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 108 (Vascular Disease), ESRD (V21) category 108 (Vascular Disease), and ESRD (V24) category 108 (Vascular Disease).