A rich, phony doc’s treated people who aren’t really sick (14)
I believe the answer is:
hypochondriacs
'a rich phony doc's treated people who aren't really sick' is the definition.
I can't tell whether this defines the answer.
'a rich phony doc's treated' is the wordplay.
'treated' indicates anagramming the letters.
'a'+'rich'+'phony'+'docs'='arichphonydocs'
'arichphonydocs' anagrammed gives 'HYPOCHONDRIACS'.
Can you help me to learn more?
(Another definition for hypochondriacs that I've seen is " they invented sham pain?".)