Sitron-Hammel Radiology Group. Diagnostic Radiology • 5 Providers. 4277 Hempstead Tpke Ste 200, Bethpage NY, 11714. Make an Appointment. (516) 796-4340. Sitron-Hammel Radiology Group is a medical group practice located in Bethpage, NY that specializes in Diagnostic Radiology. Providers Overview Location Reviews..