14 days for a broken leg

[pcmacdaniel]

Click the arrow under the "hire a doctor" tab, and you can heal all injuries for at most, 15 reds.

If the "confirm 5 reds tab" is clicked instead, you'll spend 5 red for each day the player is injured.

It took several months to figure it out for me and had been healing injuries day by day, like you just did. Healing injuries is way more complicated than it needs to be.