To communicate that a physician is providing a service in an unlisted health professional shortage area (HPSA), the coder should append modifier:

Question

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Modifier AQ is used to indicate that a service was provided in a Health Professional Shortage Area (HPSA). This modifier is appended to healthcare claims to signify that the service was rendered in an area designated as having a shortage of health professionals.

To Communicate That a Physician Is Providing a Service in an Unlisted