I'm not sure where to find an actual questionnaire online, but if you do a search in the PhysioLibrary, PubMed comes up with quite a few results, with studies relating to this issue. I'm sure if you looked closer at these studies, the questionnaire itself may be available. Here is one example: Physiother Can 1994 Summer;46(3):178-89
Implementing CQI: measuring levels of service quality at physiotherapy clinics.
McIntosh G, Mayo MC, Stymiest PJ.
Canadian Back Institute, Toronto, Ontario.
The purpose of this study was to provide a profile of patient perceptions of the service quality delivered by a back pain rehabilitation clinic. Data were gathered and analyzed at the clinic level in twelve different locations across Canada. Measurement techniques were based on validated survey methods and developed from a growing stream of social science research. Results provided clinic managers with a profile of perceived service quality in terms of three key aspects: administrative support, quality of therapy received, and satisfaction with the results. The results also provided each clinic with benchmarks so that on-going service quality measurements can be incorporated into a system of continuous quality improvement. This process can assist rehabilitation clinics (and other health care providers) in improving service as well as ultimately reducing the costs of providing treatments involving physiotherapy.