What is ICD-10 code I71.51?

I71.51 is the ICD-10-CM diagnosis code for Supraceliac aneurysm of the thoracoabdominal aorta, ruptured. A ruptured bulging of the aorta in the chest and upper abdomen area, specifically above the celiac artery. It belongs to the ICD-10-CM chapter for diseases of the circulatory system (i00-i99). I71.51 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. I71.51 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. I71.51 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. I71.51 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.

Which HCC does I71.51 map to under V28?

I71.51 maps to CMS-HCC V28 HCC 264 (Vascular Disease with Complications). The category numbers, labels, and conditions come from the CMS-HCC V28 model file for payment year 2026.

2026 ICD-10-CM I71.51: Supraceliac aneurysm

I71.51 maps to CMS-HCC V28 264. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC coding software

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Code lookupI71.51

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the circulatory system (I00-I99) / Diseases of arteries, arterioles and capillaries (I70-I79)

I71.51

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

Supraceliac aneurysm of the thoracoabdominal aorta, ruptured

A ruptured bulging of the aorta in the chest and upper abdomen area, specifically above the celiac artery.

Buddy Insight

Ruptured supraceliac aneurysm of the thoracoabdominal aorta is a catastrophic vascular emergency involving the aortic segment above the celiac trunk.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

Mapped

HCC 264

Vascular Disease with Complic...

Code-level coefficient reference

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

Mapped

HCC 154

HHS-HCC 154 adult, RAF varies...

Code-level coefficient reference

ESRD/PACE

Mapped

HCC 107

Vascular Disease with Complic...

Code-level coefficient reference

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

I71Aortic aneurysm and dissection I71.5Thoracoabdominal aortic aneurysm, ruptured I71.51Supraceliac aneurysm of the thoracoabdominal aorta, ruptured

Inclusion Terms

Official

No inclusion terms are included in this display for I71.51. Check the code and parent instructions in the Code Book.

Excludes 2

Official

certain conditions originating in the perinatal period (P04-P96)Inherited from I00-I99
certain infectious and parasitic diseases (A00-B99)Inherited from I00-I99
complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from I00-I99
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Inherited from I00-I99
endocrine, nutritional and metabolic diseases (E00-E88)Inherited from I00-I99
injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from I00-I99
neoplasms (C00-D49)Inherited from I00-I99
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from I00-I99
systemic connective tissue disorders (M30-M36)Inherited from I00-I99
transient cerebral ischemic attacks and related syndromes (G45.-)Inherited from I00-I99

Related Codes

Official

I71.50Thoracoabdominal aortic aneurysm, ruptured, unspecified I71.52Paravisceral aneurysm of the thoracoabdominal aorta, ruptured

Includes

Official

No Includes notes are included in this display for I71.51. Check the code and parent instructions in the Code Book.

Excludes 1

Official

No Excludes 1 notes are included in this display for I71.51. Check the code and parent instructions in the Code Book.

Code First

Official

, if applicable:Inherited from I71
syphilitic aortic aneurysm (A52.01)Inherited from I71
traumatic aortic aneurysm (S25.09, S35.09)Inherited from I71

Use Additional

Official

No Use Additional Code instructions are included in this display for I71.51. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for I71.51. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

Specific anatomic documentation of supraceliac location (above the celiac artery)

Evidence of rupture confirmed by imaging, surgical findings, or clinical presentation

Hemodynamic status and resuscitative measures

Involvement of branch vessels (celiac, superior mesenteric artery, renal arteries)

MEAT Support

HCC Buddy guidance

Specific anatomic documentation of supraceliac location (above the celiac artery)

Evidence of rupture confirmed by imaging, surgical findings, or clinical presentation

Hemodynamic status and resuscitative measures

Involvement of branch vessels (celiac, superior mesenteric artery, renal arteries)

Audit Caution

HCC Buddy guidance

Defaulting to the unspecified thoracoabdominal ruptured code (I71.50) when the operative note specifies supraceliac involvement

Confusing supraceliac with suprarenal — supraceliac is above the celiac trunk, suprarenal is above the renal arteries

Missing the rupture designation when documentation describes a contained hematoma or leak

Not querying the provider for anatomic specificity when the imaging report provides the detail but the clinical note does not

Common Mistakes

HCC Buddy guidance

I71.61 — Supraceliac aneurysm of the thoracoabdominal aorta, without rupture: intact aneurysm, no rupture

I71.52 — Paravisceral aneurysm of the thoracoabdominal aorta, ruptured: paravisceral involves the visceral segment but is anatomically distinct from supraceliac

I71.50 — Thoracoabdominal aortic aneurysm, ruptured, unspecified: less specific — use the supraceliac code when documentation supports it

I71.1 — Thoracic aortic aneurysm, ruptured: purely thoracic, does not extend to abdominal segment

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 I71.51 an HCC code?

Yes. I71.51 (Supraceliac aneurysm of the thoracoabdominal aorta, ruptured) maps to HCC 264, Vascular Disease with Complications under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.455. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: I71.51 is billable and maps to V28 HCC 264, Vascular Disease with Complications. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code: I71.51
Description: Supraceliac aneurysm of the thoracoabdominal aorta, ruptured
HCC (V28): HCC 264 — Vascular Disease with Complications
RAF reference coefficient: 0.455
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 264, Vascular Disease with Complications

0.455

ESRDHCC 107, Vascular Disease with Complications

Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. 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 context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work I71.51 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for I71.51

For I71.51, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

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

Coder workflow notes

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What This Code Means

I71.51 is the ICD-10-CM diagnosis code for supraceliac aneurysm of the thoracoabdominal aorta, ruptured. A ruptured bulging of the aorta in the chest and upper abdomen area, specifically above the celiac artery. I71.51 sits in the ICD-10-CM chapter for diseases of the circulatory system (i00-i99), within the section covering diseases of arteries, arterioles and capillaries (i70-i79).

Under the CMS-HCC V28 risk adjustment model, I71.51 maps to Vascular Disease with Complications (HCC 264) with a source-labeled community, non-dual, aged reference coefficient of 0.455. No V24 mapping is shown for I71.51; use the applicable model and payment year when reviewing the V28 mapping. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

Supraceliac indicates the aneurysm is located above the celiac artery origin - verify this anatomical detail in imaging reports. For I71.51, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. 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, source-labeled coefficient references, and MEAT documentation criteria for I71.51 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Supraceliac indicates the aneurysm is located above the celiac artery origin - verify this anatomical detail in imaging reports
•This is a ruptured aneurysm; document the rupture status clearly and consider coding for shock or other complications

Clinical Significance

Ruptured supraceliac aneurysm of the thoracoabdominal aorta is a catastrophic vascular emergency involving the aortic segment above the celiac trunk. This location makes surgical repair exceptionally challenging due to the need to manage blood flow to visceral organs. The specificity of this code reflects the critical nature of the anatomic involvement and the complexity of required intervention.

Documentation Requirements

✓Specific anatomic documentation of supraceliac location (above the celiac artery)
✓Evidence of rupture confirmed by imaging, surgical findings, or clinical presentation
✓Hemodynamic status and resuscitative measures
✓Involvement of branch vessels (celiac, superior mesenteric artery, renal arteries)
✓Surgical or endovascular intervention details
✓End-organ perfusion status and any ischemic complications

Commonly Confused Codes

•I71.61: Supraceliac aneurysm of the thoracoabdominal aorta, without rupture: intact aneurysm, no rupture
•I71.52: Paravisceral aneurysm of the thoracoabdominal aorta, ruptured: paravisceral involves the visceral segment but is anatomically distinct from supraceliac
•I71.50: Thoracoabdominal aortic aneurysm, ruptured, unspecified: less specific: use the supraceliac code when documentation supports it
•I71.1: Thoracic aortic aneurysm, ruptured: purely thoracic, does not extend to abdominal segment