In 2012, LEGO released 2 City Medical sets, all of these sets have been retired. For that year, the total price of all retail sets cost $80, today those sets are valued around $189, a growth of 136%.
Most valuable 2012 LEGO City Medical set
4431 Ambulance $95.34
Largest 2012 LEGO City Medical set
4429 Helicopter Rescue 425 pieces
2 sets

4429 Helicopter Rescue

Theme / Subtheme City / Medical
Year 2012
Pieces / Minifigs 425 / 4
Availability Retired
4429 LEGO City Helicopter Rescue
Retail $59.99
Value $93.66
Growth  +56.1%
Annual growth 4.0%

4431 Ambulance

Theme / Subtheme City / Medical
Year 2012
Pieces / Minifigs 199 / 3
Availability Retired
4431 LEGO City Ambulance
Retail $19.99
Value $95.34
Growth  +376.9%
Annual growth 8.1%