Who are the three doctors in the Bible?
Luke is an obvious answer: "Luke the beloved physician and Demas greet you" (Colossians 4:14).
Jesus said that a proverb concerning physicians could be applied to himself, "He said to them, "You will surely say this proverb to Me, 'Physician, heal yourself! Whatever we have heard done in Capernaum, do also here in Your country.'"" (Luke 4:23). However, this isn't saying Jesus was a doctor even though he healed many people.
Egyptians physicians were asked to embalm Jacob's body (Genesis 50:2) and Asa is mentioned as consulting physicians about his foot ailment (II Chronicles 16:2), but these doctors were not named. Nor the doctors seen by the woman with the hemorrhage were named (Mark 5:26; Luke 8:43).
The King James Version translates "teacher of the Law" as "doctor of Law," thus Gamaliel is referred to as a doctor of law in Acts 5:34. An unnamed group of doctors of law are mentioned in Luke 2:46; and 5:17.