Dr Sa-uding Salaereh, 51, was returning home on a motorbike after work as a village security volunteer at midnight when he was shot in Ban Po Maeng by unknown gunmen hiding in a roadside bush.
Sa-uding fled from bullets but fell 100 metres away after being chased and shot at by two men on a motorbike, which prompted him to fire back at them.
Soldiers nearby heard the gunshots and rushed to his aid, prompting the assailants to retreat.
The doctor sustained gunshot wounds in his right arm and right leg.