HCPCS Level II

M1299: Influenza immunization administered or previously received

A MIPS quality-data code. MIPS (the Merit-based Incentive Payment System) is Medicare's quality program for clinicians. The code reports quality data on a claim. It is not a billed service.

Source: CMS HCPCS Level II, October 2026 file dated September 23, 2026. Publisher page

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