PHI Air Medical is headquartered in Phoenix, Arizona and has more than 65 air ambulance bases throughout the United States, including 11 in Arizona which is the second most popular operating location after Texas with 20 bases. The company is a subsidiary of PHI, Inc. which also has a large fleet of helicopter supporting offshore oil and gas operations in the US and elsewhere. This AS350B-2 was photographed at the PHI base at Casa Grande Municipal Airport, AZ.