The 2013 Health Professional Shortage Area (HPSA) Zip code file has been posted to the CMS website. Dates of service are extremely important in determining HPSA eligibility. For Medicare payment purposes, the HPSA locations may change on January 1 each year. They do not change on any other date. For example, if you determine the location becomes eligible during the year, you cannot begin using the AQ HCPCS modifier until January 1 of the following year. For qualified areas, the bonus of 10% will be paid on a quarterly basis.
Important reminders about the use of HPSA HCPCS modifier AG can be found at: