A dual-band implantable microstrip antenna design is proposed for MISC/ISM biomedical telemetry systems. The radiating layer of the antenna is comprised of two concentric square split-ring elements and a metallic pad placed between them. A shorting-pin is also used for miniaturization purposes directly connecting the outer ring element to the ground plane. It is numerically demonstrated that the proposed antenna offers approximately 7% and %13 impedance bandwidths and gains of 2.1 dBi and 4.52 dBi at the designated MICS and ISM frequency bands, respectively. Note that the full-wave analysis of the implant antenna is carried out using CST Microwave Studio simulator.