Question 1

What is ICD-10 code Z14.8?

Accepted Answer

Z14.8 is the ICD-10-CM diagnosis code for genetic carrier of other disease. A person who carries a gene for a genetic disease other than hemophilia A or cystic fibrosis. Z14.8 sits in the ICD-10-CM chapter for factors influencing health status and contact with health services (z00-z99), within the section covering genetic carrier and genetic susceptibility to disease (z14-z15).

Z14.8 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.

Use this code for carriers of conditions not specifically listed in Z14.01-Z14.1.

Question 2

Is Z14.8 an HCC code?

Accepted Answer

No. Z14.8 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 Z14.8 billable?

Accepted Answer

Yes. Z14.8 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. Z14.8 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 Z14.8?

Accepted Answer

Z14.8 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 Z14.8 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 Z14.8?

Accepted Answer

Use this code for carriers of conditions not specifically listed in Z14.01-Z14.1 Consider adding a secondary code or documentation to specify which genetic condition the patient carries

HCC Buddy Code Card

Z14.8

Is Z14.8 an HCC code?

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Open Z14.8 in the Interactive Encoder

Z14.8 ICD-10-CM Code: Genetic carrier of other disease

HCC Buddy Code Card

Z14.8

Is Z14.8 an HCC code?

What This Code Means

Coding Tips

Child Codes

Code Hierarchy

Open Z14.8 in the Interactive Encoder