Question 1

What is ICD-10 code H47.399?

Accepted Answer

H47.399 is the ICD-10-CM diagnosis code for other disorders of optic disc, unspecified eye. Various other abnormalities or disorders affecting the optic disc with unspecified eye involvement. These may include structural changes or other disc-related conditions. H47.399 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering disorders of optic nerve and visual pathways (h46-h47).

H47.399 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 code in the series; attempt to obtain laterality information from the provider.

Question 2

Is H47.399 an HCC code?

Accepted Answer

No. H47.399 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 H47.399 billable?

Accepted Answer

Yes. H47.399 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. H47.399 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 H47.399?

Accepted Answer

H47.399 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 H47.399 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 H47.399?

Accepted Answer

This is the least specific code in the series; attempt to obtain laterality information from the provider Use only when the eye affected cannot be determined from documentation

HCC Buddy Code Card

H47.399

Is H47.399 an HCC code?

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Open H47.399 in the Interactive Encoder

H47.399 ICD-10-CM Code: Other disorders of optic disc, unspecified eye

HCC Buddy Code Card

H47.399

Is H47.399 an HCC code?

What This Code Means

Coding Tips

Child Codes

Code Hierarchy

Open H47.399 in the Interactive Encoder