A combined diagnostic device for use by medical professionals, which can function as both a stethoscope and a reflex hammer. The combined diagnostic device can function as a stethoscope and a reflex hammer. The diaphragm housing of the stethoscope can be modified so as to act as the head of the reflex hammer and a telescoping handle can connect to and be extend from the diaphragm housing. This design would allow for two instruments to be available to the medical professional without the inconvenience of needing to carry two instruments. The combined diagnostic device would have approximately the same mass and dimensions as a typical stethoscope allowing it to be stored and transported as if it were a typical stethoscope.