Unless it was made to be able to draw energy from some chemical gradient that exists in the interstitial fluid, or extract energy using "artificial mitochondria" of some kind.
RFID tags are used for pet cats, and my guy at the office implanted a small one between his fingers (metacarpals 3-4) years ago. He uses it for many things - doors etc. It’s a passive radio, taking energy of the radio waves and then broadcasting a signal. RFID is used a lot in retail too.