HCPCS A4238 is officially defined as "Supply allowance for adjunctive, non-implanted continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service." HCPCS A4238 is referenced in 4 tracked payer policy changes from UnitedHealthcare, Excellus BlueCross BlueShield, and 1 other payer. For billers and coders, staying current on payer-specific coverage criteria, reimbursement rules, and prior-authorization requirements for HCPCS A4238 is critical to clean claim submission. Each entry below links to the full policy analysis with effective dates and action steps.
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