Who is affected by this change?

This affects Indiana Medicaid (IHCP) in IN on Medicaid plans.

When does this change take effect?

This change is effective Oct 1, 2023.

Which billing codes are affected?

The following codes are affected: 90480, 91318, 91319, 91320, 91321.

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MedicaidBilling CodesMedium impact

BT2023165: Updated coverage and billing information for the 2023 October HCPCS codes

Indiana Medicaid (IHCP)·IN·Claims & Billing

Effective date

Oct 1, 2023

We identified it

Jun 19, 2026

Days to comply

—

Summary

Indiana Health Coverage Programs (IHCP) updated HCPCS codes effective October 1, 2023, including new COVID-19 vaccine codes, procedure code changes, and billing guidelines. This bulletin replaces previous guidance and includes new codes for various medical services with specific coverage and billing requirements.

Action Required

Action needed

By February 28, 2024 (90 days for managed care) or May 29, 2024 (180 days for FFS): Billing team must update claim processing systems with new HCPCS codes from October 2023 quarterly update. Update COVID-19 vaccine billing procedures to use new codes 90480, 91318-91321 with age-specific restrictions. For claims submitted beyond standard filing limits, include first page of bulletin BT2023165. Review all 9 updated code tables and modify billing software accordingly.

Affected Billing Codes

90480

91318

91319

91320

91321

Related policy hubs

Indiana Medicaid (IHCP) policies IN policy changes Code 90480 Code 91318 Code 91319 Code 91320 Code 91321