Most certainly if you are in the business of prescribing medical marijuana to patients you would have medical malpractice based errors and omissions coverage (otherwise known as Professional Liability Insurance). However, for those that are on the retail side or growing side, this type of coverage could be a good idea as it could include a number of different coverage option: 1) Improper labeling 2) Infringement Type Claims where an allegation of intellectual property theft is made 3) Misreading an identification card resulting in wrongful and wrongful dispense claim.