You do not need any intermediate services, promising to "facilitate" the acquisition of your card. I would also avoid those providers who come to the Islands for day clinics from other states, once a month or so, even charging over $200 for the medical fee. Some give free evaluations but still charge $250 to "sign and process" the forms. There are plenty of Hawaii based physicians to care for your needs on all the islands. It does not take much work to find a provider based here, and to do it right. You must be evaluated by a Narcotics Enforcement Division certified physician, and all legitimate medical doctors will be able to show you their NED certificate.
Also, the scams that I have seen here on Oahu usually are located in facilities that are clearly not medical offices. As well, it would be wise to stay away from those providers who see patients in groups, in private homes or offices, if you want to guarantee that your card will be valid for the entire year. The state regulations are clear that it must be done within the settings of a legitimate medical encounter with the development of a true doctor-patient relationship. Some physicians may do otherwise but you do not have to take that risk. Make sure that the program stays legitimate for the benefit of those who truly are in need.
I have heard from a few patients that one provider in Honolulu is promising that he can get the cards to them in 24 hours. I don't know what he is giving them but it is NOT valid. Only the Hawaii Narcotics Enforcement Division (NED) can issue any licenses.