Question 1

What is ICD-10 code I67.848?

Accepted Answer

I67.848 is the ICD-10-CM diagnosis code for other cerebrovascular vasospasm and vasoconstriction. Other types of temporary or persistent narrowing of brain blood vessels that are not classified elsewhere. I67.848 sits in the ICD-10-CM chapter for diseases of the circulatory system (i00-i99), within the section covering cerebrovascular diseases (i60-i69).

I67.848 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.

Use this code only when the vasospasm/vasoconstriction does not fit more specific I67.84 subcategories.

Question 2

Is I67.848 an HCC code?

Accepted Answer

No. I67.848 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 I67.848 billable?

Accepted Answer

Yes. I67.848 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. I67.848 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 I67.848?

Accepted Answer

I67.848 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 I67.848 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 I67.848?

Accepted Answer

Use this code only when the vasospasm/vasoconstriction does not fit more specific I67.84 subcategories Document the specific type of vasospasm and any associated clinical presentation

I67.848

Is I67.848 an HCC code?

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Open I67.848 in the Interactive Encoder