Is it possible to upgrade an electrical panel without re-wiring the entire house?

Answer: In most cases
Explanation: In most cases if the wire is knob and tube or if the wire does not have a ground its highly recommended to rewire the house

Answer: Always
Explanation: The interior wiring of a house different than your panel is for everything starts Trump, so you don't have to replace everything past. That's unless there is electrical issues with the wiring

Answer: In most cases
Explanation: the existing panel can probably be replaced with a new panel rated for 200 amps (featuring circuit breakers, of course) without a total rewiring.

Answer: In most cases
Explanation: Sometimes the wiring is in such a condition that it needs to be replaced. There are ways to get around this but is very much a case-by-case situation.

Answer: Always
Explanation: remove old panel and install new panel. a professional will check load distribution to ensure power is not being wasted. if there is an unbalanced load, he should redistribute power for energy efficiency

Answer: Always
Explanation: shouldn't be a need to re wire the entire house on a panel change out

Answer: In most cases
Explanation: This depends on your local inspection department and what they require when a power upgrade is required.

Answer: Always
Explanation: Yes

Answer: In most cases
Explanation: Just check local codes

Answer: Always
Explanation: Yes as long as you dont have knob n tube wiring. If you have metal BX or romex your good to go.