Question 1

What is ICD-10 code L03.112?

Accepted Answer

L03.112 is the ICD-10-CM diagnosis code for cellulitis of left axilla. A bacterial skin infection (cellulitis) affecting the left armpit area, causing redness, swelling, warmth, and tenderness. L03.112 sits in the ICD-10-CM chapter for diseases of the skin and subcutaneous tissue (l00-l99), within the section covering infections of the skin and subcutaneous tissue (l00-l08).

L03.112 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.

The axilla (armpit) is a common site for cellulitis due to skin folds and moisture; ensure left side is clearly documented.

Question 2

Is L03.112 an HCC code?

Accepted Answer

No. L03.112 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 L03.112 billable?

Accepted Answer

Yes. L03.112 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. L03.112 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 L03.112?

Accepted Answer

L03.112 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 L03.112 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 L03.112?

Accepted Answer

The axilla (armpit) is a common site for cellulitis due to skin folds and moisture; ensure left side is clearly documented Document any associated lymphadenopathy or systemic symptoms that may indicate severity

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L03.112

Is L03.112 an HCC code?

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L03.112 ICD-10-CM Code: Cellulitis of left axilla

HCC Buddy Code Card

L03.112

Is L03.112 an HCC code?

What This Code Means

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Child Codes

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Open L03.112 in the Interactive Encoder