First Aid

To emulate 1 level in the Physician class, change your Medicine skill to Intelligence and you may double your proficiency bonus on Intelligence (Medicine) checks.,
Your hit die for 1 level of Physician is 1d8+CON modifier. This must be done manually on your character sheet.

At 1st level, you have enough experience to perform simple and quick treatments when needed. As an action you can give first aid to a creature within 5ft of you. When you do so, choose a 1d8 First Aid Die available to you, then make an Intelligence (Medicine) check. These dice are not expended. The DC for the Intelligence (Medicine) check is 12. On a success, roll the First Aid Die and the target creature heals 1d8+1 hit points. On a failure, they regain half the number of hit points. If the result of the Intelligence (Medicine) check is greater than the DC by 5 or more, you roll twice the number of First Aid Dice you chose when beginning the attempt. A creature can only be healed by First Aid number of times equal to your proficiency modifier, before requiring to take a short rest to be healed this way again.

Additionally, you may stabilize an unconscious creature as a bonus action, and doing so does not require an Intelligence (Medicine) check, as long as you are familiar with the creature’s general biology.