This modifier is effective for dates of service on or after January 1, 2010. Submit this modifier with claims from the principal physician of record. HCPCS modifier AI identifies the physician that oversees the patient’s care from all other physicians who may be furnishing specialty care. Only the principal physician of record may submit this modifier.

This modifier may be submitted with the following CPT codes 99221–99223 and 99304–99306.

Reference: CMS MLN Matters article MM6740, Revisions to Consultation Services Payment Policy (PDF, 133 KB).

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