What is ICD-10 code I75.89?

I75.89 is the ICD-10-CM diagnosis code for Atheroembolism of other site. Cholesterol crystals or plaque fragments break loose from arteries and lodge in blood vessels of other body sites not specifically listed. It belongs to the ICD-10-CM chapter for diseases of the circulatory system (i00-i99). I75.89 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. I75.89 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. I75.89 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. I75.89 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.

What is the V28 vs V24 difference for I75.89?

CMS phased in the V28 risk adjustment model over payment years 2024 (33%), 2025 (67%), and 2026 (100%), replacing V24. V28 consolidates HCC categories, removes some lower-acuity conditions, and recalibrates RAF weights across the entire model. For I75.89, V28 maps to Vascular Disease with Complications at RAF 0.455 while V24 mapped to Vascular Disease with Complications at RAF 0.383. Both models can still appear in legacy data and in payer-specific lookback periods.

What should coders know when reporting I75.89?

Specify the affected site in documentation for clarity and potential future code specificity Common sites include mesenteric, cerebral, or splenic arteries Because I75.89 maps to a payment HCC, the documentation must also satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's risk adjustment score.

2026 ICD-10-CM I75.89: Atheroembolism of other

ICD-10-CM Code View

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Code lookupI75.89Effective 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)

I75.89

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

Atheroembolism of other site

Cholesterol crystals or plaque fragments break loose from arteries and lodge in blood vessels of other body sites not specifically listed.

Buddy Insight

Atheroembolism of other sites captures cholesterol embolization to vascular territories not elsewhere classified, such as the gastrointestinal tract, spleen, pancreas, or skin.

CMS-HCC V28

Mapped

HCC 264

Vascular Disease with Complic...

RAF 0.455

CMS-HCC V24

Mapped

HCC 107

Vascular Disease with Complic...

RAF 0.383

ACA/HHS

Mapped

HCC 154

HHS-HCC 154

Varies by metal level

ESRD/PACE

Mapped

HCC 107

Vascular Disease with Complic...

RAF 0.144

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

I75Atheroembolism

I75.8Atheroembolism of other sites

I75.89Atheroembolism of other site

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for I75.89 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for I75.89 in this effective period.

Related Child Codes

Official

I75.81Atheroembolism of kidney

Includes

Official

ICD-10-CM does not list Includes notes for I75.89 in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for I75.89 in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for I75.89 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for I75.89 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for I75.89 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Documentation of atheroembolism affecting a specified site other than extremities or kidneys

Identification of the specific organ or tissue involved

Clinical findings and end-organ effects

Precipitating event documentation

MEAT Support

HCC Buddy guidance

Documentation of atheroembolism affecting a specified site other than extremities or kidneys

Identification of the specific organ or tissue involved

Clinical findings and end-organ effects

Precipitating event documentation

Audit Caution

HCC Buddy guidance

Using this code for extremity or renal atheroembolism when specific codes exist

Not coding gastrointestinal atheroembolism when cholesterol embolization syndrome involves the mesenteric circulation

Missing skin involvement (livedo reticularis, skin necrosis) that should be coded as atheroembolism of other site

Not coding multiple sites separately when cholesterol embolization affects several organs simultaneously

Common Mistakes

HCC Buddy guidance

I75.81 — Atheroembolism of kidney: renal atheroembolism has its own specific code

I75.011-I75.029 — Atheroembolism of extremities: extremity codes are specific

I74.8 — Embolism and thrombosis of other arteries: general thromboembolism rather than specifically atheroembolism

K55.0xx — Acute vascular disorders of intestine: mesenteric ischemia may result from atheroembolism but has separate codes

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 I75.89 an HCC code?

Yes. I75.89 (Atheroembolism of other site) maps to Vascular Disease with Complications under the CMS-HCC V28 risk adjustment model (and Vascular Disease with Complications under V24), with a community non-dual aged RAF of 0.455. It is billable for payment year 2026.

Coder answer: I75.89 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: I75.89
Description: Atheroembolism of other site
HCC (V28): HCC 264 — Vascular Disease with Complications
RAF: 0.455
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 264, Vascular Disease with Complications

0.455

V24HCC 107, Vascular Disease with Complications

0.383

ESRDHCC 107, Vascular Disease with Complications

0.144

Each model's RAF is its CMS base weight for that model's standard population, so 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 segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.

Work I75.89 in the Code Book — tabular path, V28 RAF, and MEAT checklist →

MEAT Criteria for I75.89

For I75.89 to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.

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

Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed I75.89 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

I75.89 is the ICD-10-CM diagnosis code for atheroembolism of other site. Cholesterol crystals or plaque fragments break loose from arteries and lodge in blood vessels of other body sites not specifically listed. I75.89 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, I75.89 maps to Vascular Disease with Complications (HCC 264) with a community, non-dual, aged base RAF weight of 0.455. Under the older V24 model, I75.89 mapped to the same category but with a base RAF weight of 0.383, V28 recalibrated weights across the entire model. V28 is the CMS-HCC risk adjustment model that reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition.

Specify the affected site in documentation for clarity and potential future code specificity. Because I75.89 maps to a payment HCC, the provider's documentation must satisfy MEAT criteria (Monitor, Evaluate, Assess, or Treat) for the encounter to count toward the patient's Medicare Advantage risk adjustment score. 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, RAF weights, and MEAT documentation criteria for I75.89 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Specify the affected site in documentation for clarity and potential future code specificity
•Common sites include mesenteric, cerebral, or splenic arteries

Clinical Significance

Atheroembolism of other sites captures cholesterol embolization to vascular territories not elsewhere classified, such as the gastrointestinal tract, spleen, pancreas, or skin. This code is essential for documenting the full extent of cholesterol embolization syndrome, which often affects multiple organ systems simultaneously. Recognition of multi-organ involvement is critical for prognosis and treatment planning.

Documentation Requirements

✓Documentation of atheroembolism affecting a specified site other than extremities or kidneys
✓Identification of the specific organ or tissue involved
✓Clinical findings and end-organ effects
✓Precipitating event documentation
✓Systemic cholesterol embolization syndrome assessment
✓Treatment plan addressing the affected organ system

Commonly Confused Codes

•I75.81: Atheroembolism of kidney: renal atheroembolism has its own specific code
•I75.011-I75.029: Atheroembolism of extremities: extremity codes are specific
•I74.8: Embolism and thrombosis of other arteries: general thromboembolism rather than specifically atheroembolism
•K55.0xx: Acute vascular disorders of intestine: mesenteric ischemia may result from atheroembolism but has separate codes