quackery

n. fraudulence, charlatanism; dishonesty, deceit

Quackery is a derogatory term used to describe questionable medical practices. According to Random House Dictionary, a "quack" is considered a "fraudulent or ignorant pretender to medical skill" or "a person who pretends, professionally or publicly, to have skill, knowledge, or qualifications he or she does not possess; a charlatan." It is defined as the "medical practice and advice based on observation and experience in ignorance of scientific findings. The dishonesty of a charlatan."
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Quackery /quack·ery/ the practice or methods of a quack. quackery the practice or methods of a quack. [more]Quackery - Community and Resources

Noun
1. medical practice and advice based on observation and experience in ignorance of scientific findings
(synonym) empiricism
(hypernym) medical practice
(derivation) quack
2. the dishonesty of a charlatan
(synonym) charlatanism
(hypernym) dishonesty, knavery

(n.)
The acts, arts, or boastful pretensions of a quack; false pretensions to any art; empiricism.