Question 1

What is ICD-10 code H35.442?

Accepted Answer

H35.442 is the ICD-10-CM diagnosis code for age-related reticular degeneration of retina, left eye. An age-related degenerative condition of the retina in the left eye characterized by a reticular or net-like pattern of tissue breakdown. H35.442 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering disorders of choroid and retina (h30-h36).

H35.442 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.

Verify left eye is the affected eye in the medical documentation.

Question 2

Is H35.442 an HCC code?

Accepted Answer

No. H35.442 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 H35.442 billable?

Accepted Answer

Yes. H35.442 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. H35.442 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 H35.442?

Accepted Answer

H35.442 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 community model rewards H35.442 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's V28/V24 community RAF score in either version. Coders should check whether provider documentation supports a more specific child code that does map to a community payment HCC.

Question 5

What should coders know when reporting H35.442?

Accepted Answer

Verify left eye is the affected eye in the medical documentation Ensure the condition is documented as age-related rather than secondary to trauma or other causes

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H35.442

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H35.442 ICD-10-CM Code: Age-related reticular degeneration of retina, left eye

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H35.442

Is H35.442 an HCC code?

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What This Code Means

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Child Codes

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Work H35.442 in HCC Buddy