The heart surgeon in 

Scrubs who is based on a real-life friend and medical advisor to showrunner Bill Lawrence is Dr. Jon Turk, who inspired the character of Christopher Turk. 

Here are the key details regarding this connection:

• Real-Life Basis: The character of Dr. Christopher Turk (played by Donald Faison) is based on Dr. Jon Turk, a real-life physician who served as a medical consultant for the show.
• The Name: The character’s name “Turk” is derived directly from Jon Turk.
• Character Role: In the show, Turk is the best friend of protagonist J.D. and becomes the Chief of Surgery at Sacred Heart Hospital.
• Context: Bill Lawrence often utilized real doctors to advise on the show, which helped maintain medical accuracy alongside the comedy. 

Note: The main character J.D.'s name is also based on a real person, Dr. Jonathan Doris, who was a college friend of Bill Lawrence and served as a medical adviser to the show.