No, the phrase "physician, heal thyself" is not attributed to Plato. It actually comes from the Bible in Luke 4:23.
Medic - 1954 Physician Heal Thyself 1-23 was released on: USA: 11 April 1955
Mister Roberts - 1965 Physician Heal Thyself 1-3 was released on: USA: 1 October 1965
One Life to Live - 1968 Physician Heal Thyself 1-10507 was released on: USA: 21 August 2009
Chicago Hope - 1994 Physician Heal Thyself 4-24 was released on: USA: 13 May 1998 Germany: 24 March 1999
"Cure yourself" It's fashioned after Jesus saying "Physician, heal thyself" from the Bible.
He'll have to stay off of his heel for awhile if wants it to heal quickly.
ER - 1994 Heal Thyself 15-7 is rated/received certificates of: Netherlands:12
Buck James - 1987 Heal Thyself 1-18 was released on: USA: 28 April 1988
Who's the Boss - 1984 Beautician Heal Thyself 6-24 was released on: USA: 10 April 1990 Belgium: 2011
Magnum P-I- - 1980 Heal Thyself 3-11 was released on: USA: 16 December 1982 Germany: 24 March 1991
Northern Exposure - 1990 Heal Thyself 5-8 was released on: USA: 15 November 1993 Hungary: 30 May 2008