A doctor of questionable competence, often referred to in a derogatory manner.

एक डॉक्टर जिसकी योग्यता संदिग्ध हो।

English Usage: Many people think he is a b s doctor because of his unorthodox methods.

Hindi Usage: कई लोग सोचते हैं कि वह एक संदिग्ध डॉक्टर है क्योंकि उसके तरीक़े असामान्य हैं।