Question 1

What is ICD-10 code Y71.8?

Accepted Answer

Y71.8 is the ICD-10-CM diagnosis code for miscellaneous cardiovascular devices associated with adverse incidents, not elsewhere classified. A harmful event or complication from cardiovascular devices that don't fit into other specific categories. Y71.8 sits in the ICD-10-CM chapter for external causes of morbidity (v00-y99), within the section covering medical devices associated with adverse incidents in diagnostic and therapeutic use (y70-y82).

Y71.8 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

Reserve for unusual or miscellaneous cardiovascular device incidents not classified elsewhere.

Question 2

Is Y71.8 an HCC code?

Accepted Answer

No. Y71.8 is a billable ICD-10-CM code but does not map to any payment HCC category under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can still be reported on Medicare Advantage encounter data submissions, but it does not contribute to the beneficiary's Risk Adjustment Factor (RAF) score and therefore does not affect the risk-adjusted capitation payment to the plan. V28 reached 100% phase-in for payment year 2026.

Question 3

Is Y71.8 billable?

Accepted Answer

Yes. Y71.8 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. Y71.8 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.

Question 4

What is the V28 vs V24 difference for Y71.8?

Accepted Answer

Y71.8 does not map to a payment HCC under either the CMS-HCC V28 risk adjustment model or the older V24 model. V28 reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. Because neither model rewards Y71.8 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's RAF score in either version. Coders should check whether provider documentation supports a more specific child code that does map to a payment HCC.

Question 5

What should coders know when reporting Y71.8?

Accepted Answer

Reserve for unusual or miscellaneous cardiovascular device incidents not classified elsewhere Provide detailed documentation of the device type and nature of the adverse event

HCC Buddy Code Card

Y71.8

Is Y71.8 an HCC code?

What This Code Means

Coding Tips

Child Codes

Code Hierarchy

Open Y71.8 in the Interactive Encoder

Y71.8 ICD-10-CM Code: Miscellaneous cardiovascular devices associated with adverse incidents, not elsewhere classified

HCC Buddy Code Card

Y71.8

Is Y71.8 an HCC code?

What This Code Means

Coding Tips

Child Codes

Code Hierarchy

Open Y71.8 in the Interactive Encoder