Question 1

What is ICD-10 code H00.029?

Accepted Answer

H00.029 is the ICD-10-CM diagnosis code for hordeolum internum unspecified eye, unspecified eyelid. A painful infection or swelling of the inner eyelid structures when neither the specific eye nor the eyelid location is documented. H00.029 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering disorders of eyelid, lacrimal system and orbit (h00-h05).

H00.029 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.

This is the least specific internal hordeolum code; use only when documentation is insufficient for greater specificity.

Question 2

Is H00.029 an HCC code?

Accepted Answer

No. H00.029 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 H00.029 billable?

Accepted Answer

Yes. H00.029 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. H00.029 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 H00.029?

Accepted Answer

H00.029 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 H00.029 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 H00.029?

Accepted Answer

This is the least specific internal hordeolum code; use only when documentation is insufficient for greater specificity Always attempt to obtain clarification on which eye and which eyelid is affected before defaulting to this code

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H00.029

Is H00.029 an HCC code?

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H00.029 ICD-10-CM Code: Hordeolum internum unspecified eye, unspecified eyelid

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H00.029

Is H00.029 an HCC code?

What This Code Means

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Child Codes

Code Hierarchy

Open H00.029 in the Interactive Encoder