In a large purpose built retail facility, bike racks can be relatively easy to incorporate into the design. Not so in an old converted shopfront that already has significant demands upon parking real estate!
Your doctor most likely needs to ensure access for multiple ambulances, wheely walkers, wheelchairs, even mobility scooters. They usually need at least 2 parking spots with extra space for people with reduced mobility, are constantly having to ask eople to move their cars out of the ambulance or disabled parking bays, and haven't yet realised that providing a bike rack will encourage cyclists to park where it is least inconvenient to others . Perhaps point this out?
Don't just ask for a bike rack, explain that bike racks encourage you to park in " the correct " place.