Question 1

What is ICD-10 code G02?

Accepted Answer

G02 is the ICD-10-CM diagnosis code for meningitis in other infectious and parasitic diseases classified elsewhere. Inflammation of the membranes surrounding the brain and spinal cord that occurs as a complication of an infectious or parasitic disease classified elsewhere in the medical record. G02 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering inflammatory diseases of the central nervous system (g00-g09).

G02 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 code requires a secondary diagnosis code for the underlying infectious or parasitic disease.

Question 2

Is G02 an HCC code?

Accepted Answer

No. G02 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 G02 billable?

Accepted Answer

Yes. G02 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. G02 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 G02?

Accepted Answer

G02 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 G02 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 G02?

Accepted Answer

This code requires a secondary diagnosis code for the underlying infectious or parasitic disease Use this for meningitis secondary to viral infections, fungal infections, or parasitic diseases

G02

Is G02 an HCC code?

What This Code Means

Coding Tips

Excludes 1 — Do NOT code together

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Code Hierarchy

Open G02 in the Interactive Encoder