Radon Measurement Proficiency Act - Directs the Administrator of the Environmental Protection Agency to conduct research on radon and radon progeny measurement methods and protocols. Requires the Administrator to issue guidance documents that: (1) provide information on the results of such research; and (2) describe model State radon measurement and mitigation programs.

Directs the Administrator to establish a mandatory program that requires: (1) products offered for sale, or devices used in connection with public services, for radon measurement to meet minimum performance criteria; and (2) operators of devices, or persons employing techniques, used in connection with public services for radon measurement to meet a minimum level of proficiency. Requires the Administrator to establish user fees for persons seeking certification under such program. Provides for the deposit of such fees into a Radon Service Account.