Modifier AO — Alternate payment method declined by provider of service

AOHCPCS Level II

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Related modifiers

A1Dressing for one wound A2Dressing for two wounds A3Dressing for three wounds A4Dressing for four wounds A5Dressing for five wounds A6Dressing for six wounds A7Dressing for seven wounds A8Dressing for eight wounds

Frequently asked questions

What does modifier AO mean?

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HCPCS modifier data from CMS. CPT® is a registered trademark of the American Medical Association — CPT modifier descriptions are not included on this site. Always verify codes with authoritative sources before making billing decisions.