200mA current draw in a parked car is too much. It should be more like 50-100mA.
Do not trust the clamp ammeter too much for this kind of current. Use a regular in-circuit ammeter.
If you suspect your battery might be somehow damaged (which does happen from time to time even with new ones), check its voltage under high load. Make sure the battery is fully charged, then just turn on everything you can in your car (fans, lights, radio etc.). If the voltage drops below 11V in 5 minutes or less, then something is wrong with the battery.