CA is well covered by other services. Using CHP would be a last resort or because there was a rescue aspect to the call.My instructor was a CHP paramedic and he did plenty of transports for trauma, chest pain, etc. But yes, they are primarily rescue.
Perhaps in a funeral home throw them in the back medevac kinda way, but Flight For Life Denver is well acknowledged as the first civilian air medical program in the US. MSP is also essentially a ground ambulance packaged in a helicopter often with LESS experienced providers as lead. Not the example I would look to when building a HEMS program. If you want a true public use HEMS model in the US, look up Travis County Star Flight. MSP simply uses medevac to justify an insane aviation budget.MSP is well described above. Incidentally also the first civilian medevac in the country.